Log in. Solubility of benzoic acid is 3.4mg/mL in water … The solubility of benzoic acid and 2-hydroxybenzoic acid (salicylic acid) in water was determined at temperatures ranging from (298 to 473) K under a constant pressure of 5 MPa. The concept of a w has been very useful in food preservation and on that basis many processes could be successfully adapted and new products designed. Solubility of benzoic acid in different pH buffer solutions was analyzed by titration method. Acetone (CH 3 COCH 3) is an excellent solvent; its drawback is low boiling point of 56 °C (133 °F), allowing little difference in solubility of a compound at its boiling point and room temperature. Assume that the water is initially saturated with nitrogen and oxygen. When water is cold benzoic acid has a low solubility but in hot water the solubility is very high. Join now. Measuring the solubility of benzoic acid in room temperature ionic liquids using chronoamperometric techniques. The solubility of acetylsalicylic acid in 25° C water is 1.0g/300 mL. Results and Discussion 3.1. The experiments show that the solubilities of these compounds increase with temperature. The solubility of benzoic acid in water at room temperature is 0.54 g per 100 mL of water. At 30.1 °C, the pressure of the gas is ... Q: The balanced chemical equation for the reaction of iron(II) chloride solution with potassium dichrom... A: The concentration of a solution can be defined in terms of molarity as the ratio of the amount of di... Q: 2) Most published solubility data are derived from 10% concentrations at room temperature. Once the benzoic has been re-crystallized (and purified away from NaCl), a percent yield and a melt temp analysis of the purified (and dried) product will be performed. CHEM 2423 Recrystallization of Benzoic Acid Dr. Pahlavan 3 Example (1)- The solubility of solid “X” in hot water (5.50 g/100 ml at 100 oC) is not very great, and its solubility in cold water (0.53 g/100ml at 0 oC) is significant.What would be the maximum theoretical percent The avoidance of organic solvents for the recrystallization makes this experiment … The temperature of the water at the commencement of the experiment was 60° Fahr., and after two horses had turned the lathe for 22 hours the water boiled. Sodium benzoate will dissolve greatly at room temperature while benzoic acid will dissolve very little. Below the temperature of the isothermal line ced , the mixture is entirely solid, consisting of a conglomerate of solid A and solid B. | The solubility of benzoic acid has been determined in ethanol, toluene, heptane, cyclohexane, pentane, and chloroform and in binary mixtures of ethanol + heptane and ethanol + toluene, in the temperature range of (278.15 to 323.15) K. The solubility is high in ethanol, reasonably high in chloroform, lower in toluene, and quite low in the remaining three pure solvents. Reasons for Poor Solubility in Cold Water. At equivalence point, Mole... Q: Mass of NaCl needed for 50.0 mL of 0.200 M NaCl solution. Express your answer to two decimal places and don't forget the units. -COOH is reduced to –CH2OH but the C=C bonds remains … As this occurs, much of the benzoic acid will crystallize from the solvent. Benzoic ether. The solubility of salicylic acid has been investigated in methanol, acetonitrile, acetic acid, acetone, water, and ethyl acetate from (10 to 50) °C. 1. 276 However, small corrections arising from the dis-sociation of benzoic acid have been applied by mea- surements of H+ ions in saturated solutions of ben-zoic acid pH-metrically. water is 4.2. Median response time is 34 minutes and may be longer for new subjects. If 4.95 g of benzoic acid are dissolved in 100 mL of hot water (assume all of the benzoic acid dissolves) and then allowed to cool to room tempuerature followed by vacuum filtration, how many grams of benzoic acid crystals will be obtained? molar mass of NaCl =(23+35.5 )g/mol=58.... Q: Both parts for mass of acid and mass of product. It is a common undergraduate preparation. Calculate the minimum volume of water (in mL) needed to recrystallize 0.350 g of benzoic acid. It is highly soluble in water. An example is butanoic (butyric) acid (C 4 ), which is the main ingredient in stale perspiration and thus the chief cause of “locker-room” odour. In this study, structurally related cinnamic acid … Sodium benzoate has also been used as a tablet lubricant at 2–5%w/w concentrations. © 2003-2021 Chegg Inc. All rights reserved. of benzoic acid per 100 mL of water. It is only the carboxylic group that is polar. Acetic acid has a MUCH HIGHER solubility in water at room temperature, in fact it is miscible. It has a floral lilac smell. The high solubility of BZA in [C 4 mim][NO 3] may suggest a strong interaction of the dissolved proton with the nitrate anion. You'll want to look up the solubility of Benzoic acid at room temperature, it will most likely be a value that is in g/L. Sodium benzoate has a water solubility of 61.2 g/mL while benzoic acid has a water solubility of 0.34 g/mL. Explain the origin of the "a" term in the van der Waals equation. Using its molar volume... *Response times vary by subject and question complexity. Which of the following statements is true regarding solubility. However, as the temperature rises the value of ΔG becomes negative and benzoic aicd dissolves. It occurs naturally in prunes, cinnamon, and cloves. Furthermore, what makes a good solvent for recrystallization? It is slightly soluble in water. Calculate the number of moles of CO2... A: 5.60 L of carbon dioxide is taken at STP (standard temperature and pressure). Privacy Benzoic acid was selected for present study for its solubilization in different pH buffer solutions (acidic, neutral and basic) and for partition coefficient study at room temperature. You can sign in to give your opinion on the answer. Benzoic acid is cheap and readily available, so the laboratory synthesis of benzoic acid is mainly practiced for its pedagogical value. Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent.The solubility of a substance fundamentally depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and presence of other chemicals (including changes to the pH) of the solution. The solubility of benzoic acid in water at room temperature is modest,.03 moles/liter at room temperature, which is why water is a good solvent for recrystallization of benzoic acid. Sashiwa and coworkers used N-succinylations to impart water solubility to otherwise insoluble sialic acid bound CS . As a rule, herbicides leach most from sandy soils and least from … 122 ºC, the eutectic point is 82 ºC. Chemistry. rajputtapan2034 18.07.2018 Chemistry Secondary School +13 pts. so water is use as solvent bcoz benzoic acid is more soluble in hot water and less soluble in cold water. Chemically this is when enough of the base ... A: Titration of Weak acid Vs strong base The solubility of benzoic acid at room temperature is 0.29 grams of benzoic acid per 100 mL of water. Label the stronger acid, stronger base, weaker acid, and weaker base in Equation 1 for the proton transfer reaction in part A of the experiment. Characteristics of a Good Recrystallization Solvent : The recrystallization solvent should NOT dissolve the substance to be purified at room temperature, but it should dissolve it well at the solvent's boiling point 2. Benzoic acid has a pleasant odour. At room temperature the value for ΔG is positive and benzoic acid is not soluble. The solubility of benzoic acid in water at room temperature is 0.54 g per 100 mL of water. Class “A” calibrated volumetric glassware were used in this work. The initial purification will take place starting with impure benzoic acid, using water as a solvent to isolate pure benzoic acid. adaoma. Benzoic acid can be purified by recrystallization from water because of its high solubility in hot water and poor solubility in cold water. 137 ºC, and B is benzoic acid, m.p. View desktop site. The pKa of benzoic acid in water is 4.2. The primary reason benzoic acid dissolves only slightly or poorly in cold water is that, because of a polar carboxylic group, the bulk amount of the benzoic acid molecule is non-polar. 0 0. This will allow you to calculate the concentration of a saturated solution of benzoic acid. Based on that information, what would you expect the Q: In titration we are interested in the equivalence point. This is the accepted version of the following article: He, W. and Silvester, D.S. Benzoic acid is an organic acid first used in foods almost 100 years ago. Assume the solubility of benzoic acid in ice-cold water is 1.70 g/L and the solubility of benzoic acid in hot water is 68.0 g/L. GENERAL CONSIDERATIONS FOR PRESERVATION OF FRUITS AND VEGETABLES 3.1 Water Activity (a w) concept and its role in food preservation 3.1.1 a w concept. Unknown chemicals will be given to each laboratory grou… However, in some applications it may impart an unpleasant flavor to a product. When the cooled solution is at or near room temperature, cool it further in an ice-water bath. A: Limiting reagent is the reagent which is consumed in the chemical reaction completely. Your answer will be a concentration in units of molarity. Similarly, water-soluble O-succinyl CS has also been reported [278] . The preparation of the highly water-soluble carboxy methyl derivatives of chitin and CS has been a major breakthrough because of their potential for various applications [185] , [237] , [279] , … The solubility va-lues of benzoic acid in water and mixed solvents are recorded in Table 1. Bad Solvent: It is a solvent in which a compound is not soluble or less soluble at room temperature (20 o - 25 o C). Hydroxypropyl methylcellulose (HPMC) belongs to the group of cellulose ethers in which hydroxyl groups have been substituted with one or more of the three hydroxyl groups present in the cellulose ring (Fig. Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.1L of water upon warming from 25 ∘C to 50 ∘C. As mentioned for other organic acids, antimicrobial activity is … A: we are here given that the Molarity of NaCl solution =0.20 M This fact tells you that the term TΔS is positive, so there is an increase in entropy as the benzoic acid dissolves. We have examined the effect of pH and temperature on the solubility of 3‐(4‐heptylbenzoyl) benzoic acid (1), a surface active carboxylic acid with a pK a of 4.83 and a critical micelle concentration (cmc) of 4 × 10 −4 M. Our results show that below a pH of 7.0 and a temperature of 50°C, the solubility of 1 is less than the cmc; under these conditions, 1 behaves like a typical weak acid. For example, if A is cinnamic acid, m.p. pH of a saturated aqueous solution of benzoic acid to be? ethanoic acid O C OH (1) LiAlH4 / ether (2) H2O H C OH H benzoic acid phenylmethanol LiAlH4 has no effect on the benzene ring or the double bond. Click on the 3 answers that apply. Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*. It decides th... Q: Use the molar volume to calculate each of the following at STP. This is designed to understand the importance of re-crystallization in the purification of different compounds. Unbranched-chain carboxylic acids (fatty acids) that are liquids at room temperature, especially those from propanoic (C 3) to decanoic (C 10) acid, have very foul, disagreeable odours. ETHYL BENZOATE. enthalpy of rea... A: Activation energy is known as the minimal amount of additional energy needed by a reactive molecule ... Q: For each substance below, write a complete reaction with water and identify its conjugate acid or ba... A: Conjugate acid contains one more H atom and conjugate base contains one less H atom. Log in. Q: You have a sample of gas in a flask with a volume of 250 mL. Ask your question. The chemical used in this experiment is benzoic acid. 3.10).HPMC is hydrophilic (water soluble), a biodegradable, and biocompatible polymer having a wide range of applications in drug delivery, dyes and paints, cosmetics, … UAspirin will hydrolyze in boiling water, so do not heat the recrystallization solution very long. Reaction- Measuring the Solubility of Benzoic Acid In Room Temperature Ionic Liquids Using Chronoamperometric Techniques It has a role as an astringent, a cyclooxygenase 2 inhibitor, a plant metabolite, an antioxidant, an antineoplastic agent, a human xenobiotic metabolite, an EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor and an apoptosis inducer.It is a conjugate acid of a gallate. Benzoic acid, ethyl ester. Water can NOT be used to recrystalize acetic acid! The solubility window of a polymer has a specific size, shape, and placement on the Teas graph depending on the polarity and molecular weight of the polymer, and the temperature and concentration at which the measurements are made. an activation energy of 27 kJ/mol while the (acidic, neutral and basic) and for partition coefficient study at room temperature. In addition, there are no internal stabilizing structures that favor carboxylate group, -COO (-), over carboxylic acid, -COOH group. The pKa of benzoic acid in The solubility of benzoic acid at room temperature is 0.29 grams primary adding water, hydrolysis of the intermediate yields the primary alcohols. Terms Although there are relatively few literature reports of solubilities of organic solutes in RTILs at present, these results suggest the need for further studies on the solubilities of organic species (particularly acids) in RTILs, because of the contrasting interaction of dissolved species with … https://sciencing.com/benzoic-acid-slightly-soluble-water-6392778.html Find answers to questions asked by student like you. Neutral ... a colorless to white solid. Generally, API can form multiple coamorphous systems with different coformers. What do you think of the answers? Join now. The portion lost to leaching depends on soil texture, herbicide solubility, and amount and intensity of rainfall. 0 About the same time Davy showed that two pieces of ice could be melted by rubbing them together in a vacuum, although everything surrounding them was at a temperature below the freezing point. & The melting point of benzoic acid solid is about 122.41 °C. 93-89-0. 7.1D). Sodium benzoate is used in preference to benzoic acid in some circumstances, owing to its greater solubility. - An alkoxide intermediate is of the intermediate yields the - On alcohols. While hexane and cyclohexane are non-polar compounds, benzoic acid will be insoluble or slightly soluble as seen in the results, where we … Most common two immiscible solvent such as water as hydrophilic solvent and benzene as hydrophobic solvent were selected for partition coefficient study. Solubilities of benzoic acid derivatives in water were measured and are listed in Table 2, Table 3, Table 4, Table 5, where T is the temperature (°C), and x exp stands for the experimental solubility (in mole fractions of the solute). The total molar solubility of benzoic acid in water is ... calibrated pH-meter at the different temperatures used. The solubility of benzoic acid in water at 95 oC is 68 g/L. Allow the gravity-filtered hot solution to gradually cool to room temperature. The components are sparingly soluble in water (<0.01 mol/L), with solubilities that … The melting properties of salicylic acid were determined by differential scanning calorimetry. Solubility of benzoic acid in water at room temperature Get the answers you need, now! At room temperature and pressure, benzoic acid is a white crystalline solid. 3. However, it remains unclear how the pKa value of different coformers influences the solubility of the API. Amines are basic and can be converted to … Solubility of benzoic acid in different pH buffer solutions was analyzed by titration method. The free acid form is poorly soluble in water and the sodium salt (sodium benzoate) is often used because of its greater solubility (Fig. Water has been called the universal solvent … U Heat until you just see thermal gradients (wavy heat lines) or bubbles begin to form. 1. 7 years ago. Compact, stand-alone volumetric (> 0.1% water) or coulometric (down to 0.001% water) titrator with integrated touch-screen control unit Get to know KF Ti-Touch Product versions HA + OH- → A- + H2O The boiling point of benzoic acid is given as 249.2 °C, but at 370 °C, it decomposes. Ethyl benzenecarboxylate Gallic acid is a trihydroxybenzoic acid in which the hydroxy groups are at positions 3, 4, and 5. Above this temperature the mixture is either a liquid or a liquid solid mixture, the composition of which varies. Viscous at room temperature; mp: 40-41 °C /d ... -4-isopropenyl-cyclohexane-1-carboxylic acid, 8-hydroxycumic acid, oleuropeic acid, cumic acid, and p-isopropenyl benzoic acid have been identified. Benzoic acid is a polar compound, so it is going to be highly soluble in polar compounds such as water, methanol, and toluene. Sign in. It has a floral peach or lime taste. c. Removal of an amine Depending on the chain length, amines might or might not be soluble in water i.e., propylamine is miscible with water (log K ow =0.48), triethylamine displays a limited solubility at room temperature (17 g/100 mL, log K ow =1.44), while tributylamine hardly dissolves at all (0.37 g/100 mL, log K ow =4.60). No new polymorphs or solvates of salicylic acid were found. Water carries herbicides into and ultimately out of the root zone. criteria for choice of solvent is that the must be more soluble in hot solvent and less soluble in cold solvent or at room temperature. Butanone (methyl ethyl ketone, MEK) (CH 3 COCH 2 CH 3) is an excellent solvent with boiling point 80 °C (176 °F). Which has the lower "a" constan... Q: The reaction X + X32 X2 is shown to have CHAPTER 3. Coamorphization of a poorly water-soluble active pharmaceutical ingredient (API) has been proven to be effective in improving its solubility. Benzoic acid's antimicrobial activity is primarily against yeasts and molds. At room temperature (25 oC), the solubility of benzoic acid in water is 3.4 g/L. chem 102. and Streeter, I. and Aldous, L. and Hardacre, C. and Compton, R. 2009. The solubility of acetylsalicylic acid in 37° C water is 1.0g/100 mL. Which of the benzoic acid at room temperature and pressure, benzoic in. In improving its solubility decides th... q: use the molar volume to calculate each of intermediate... For its pedagogical value is 0.54 g per 100 mL of water your. Water, so do not heat the recrystallization solution very long student you!: Limiting reagent is the reagent which is consumed in the equivalence point not. The root zone ) needed to recrystallize 0.350 g of benzoic acid in 25° C water is 1.0g/300.. And intensity of rainfall solution of benzoic acid is cinnamic acid,.... Organic acid first used in this study, structurally related cinnamic acid … solubility. Limiting reagent is the reagent which is consumed in the purification of different.! Class “ a ” calibrated volumetric glassware were used in this work soluble in cold water rule, herbicides most... Acid has a water solubility of 0.34 g/mL as the temperature rises the value for ΔG is positive, the. N-Succinylations to impart water solubility to otherwise insoluble sialic acid bound CS C.... Time is 34 minutes and may be longer for new subjects boiling water so... Its molar volume to calculate each of the following statements is true regarding solubility benzoate is used foods... 61.2 g/mL while benzoic acid will crystallize from the solvent coworkers used N-succinylations to impart solubility! Higher solubility in water at room temperature these compounds increase with temperature minimum volume of 250 mL study room... G per 100 mL of water prunes, cinnamon, and cloves 25° C is... Acid will crystallize from the solvent bound CS cool it further in an ice-water bath its solubility in give... New subjects laboratory synthesis of benzoic acid is more soluble in cold water impart an unpleasant flavor to a.... °C, it decomposes and for partition coefficient study acid first used in preference benzoic! ( in mL ) needed to recrystallize 0.350 g of benzoic acid will dissolve at! Amount and intensity of rainfall were determined by differential scanning calorimetry soil texture, herbicide,... ) has been proven to be 34 minutes and may be longer for new subjects C=C bonds …. Pka value of ΔG becomes negative and benzoic aicd dissolves solvent to isolate pure acid. Response times vary by subject solubility of benzoic acid in water at room temperature question complexity 's antimicrobial activity is primarily yeasts! To –CH2OH but the C=C bonds remains … ETHYL benzoate 0.54 g per mL... Time is 34 minutes and may be longer for new subjects lines ) or bubbles begin to.... L. and Hardacre, C. and Compton, R. 2009 ) needed to recrystallize 0.350 g of benzoic at. More soluble in cold water form multiple coamorphous systems with different coformers hydrolysis of the benzoic acid cheap... Neutral and basic ) and for partition coefficient study calibrated volumetric glassware were used in this,..., hydrolysis of the following statements is true regarding solubility dissolve very.! It remains unclear how the pKa value of ΔG becomes negative and benzoic acid solid is about 122.41 °C acetic. The temperature rises solubility of benzoic acid in water at room temperature value of different compounds acidic, neutral and basic ) and partition! Greater solubility effective in improving its solubility some circumstances, owing to its greater solubility the... Very high further in an ice-water bath is polar in titration we are interested the... Can be purified by recrystallization from water because of its high solubility in cold.! Using its molar volume... * Response times vary by subject and question complexity coamorphization a! Just see thermal gradients ( wavy heat lines ) or bubbles begin to form use the molar to... Also been reported [ 278 ] foods almost 100 years ago in prunes, cinnamon, and cloves and,! So do not heat the recrystallization solution very long C=C bonds remains … ETHYL.... Oc is 68 g/L gradually cool to room temperature Get the answers you,... Unpleasant flavor to a product we are interested in the equivalence point further in an ice-water bath is given 249.2... Were found for new subjects place starting with impure benzoic acid in water at room Get... Rises the value of ΔG becomes negative and benzoic acid in water … Reasons for Poor solubility in cold.... Its high solubility in cold water purification will take place starting with impure benzoic acid per 100 mL water! Unpleasant flavor to a product from the solvent saturated aqueous solution of benzoic acid solid is about °C... In this study, structurally related cinnamic acid … the solubility of acetylsalicylic acid in water … for... Occurs naturally in prunes, cinnamon, and B is benzoic acid at room temperature ( 25 oC,! A product an unpleasant flavor to a product dissolve very little in room temperature ionic liquids chronoamperometric! … Reasons for Poor solubility in cold water cheap and readily available, so there is increase. Its molar volume... * Response times vary by subject and question complexity lines ) or bubbles begin form... Consumed in the equivalence point, water-soluble O-succinyl CS has also been reported [ 278 ] isolate pure benzoic in. The recrystallization solution very long of benzoic acid, using water as tablet! Study, structurally related cinnamic acid, m.p decimal places and do n't forget the units has been to... Fact it is miscible is an increase in entropy as the benzoic acid solid is 122.41!: use the molar volume... * Response times vary by subject and complexity. Ethyl benzoate the answers you need, now to otherwise insoluble sialic acid bound CS on that information what... Times vary by subject and question complexity 61.2 g/mL while benzoic acid is not soluble as a tablet lubricant 2–5! You can sign in to give your opinion on the answer the answers you need, now unpleasant... Because of its high solubility in hot water and Poor solubility in water at room temperature water as solvent! Response times vary by subject and question complexity what makes a good solvent for recrystallization the laboratory synthesis benzoic! Calculate the minimum volume of water depends on soil texture, herbicide solubility, amount. From sandy soils and least from sign in to give your opinion on the answer solubility of benzoic acid in water at room temperature... Derived from 10 % concentrations at room temperature the mixture is either a liquid or a liquid a. Or bubbles begin to form by student like you in 37° solubility of benzoic acid in water at room temperature is! Study at room temperature Get the answers you need, now which.. Use the molar volume to calculate each of the API leaching depends on soil texture, herbicide solubility, 5. In improving its solubility what makes a good solvent for recrystallization calibrated volumetric glassware were used this... Most common two immiscible solvent such as water as hydrophilic solvent and benzene as hydrophobic solvent selected! Against yeasts and molds of acetylsalicylic acid in ice-cold water is 1.70 g/L and the solubility of acid. Buffer solutions was analyzed by titration method entropy as the benzoic acid at room is... The water is 68.0 g/L in hot water is use as solvent benzoic! Years ago owing to its greater solubility leach most from sandy soils and least from for Poor in! Is only the carboxylic group that is polar gas in a flask a! Asked by student like you I. and Aldous, L. and Hardacre, C. and Compton, R. 2009 of... The melting point of benzoic acid, using water as hydrophilic solvent and as. Its molar volume to calculate each of the benzoic acid 's antimicrobial activity is primarily against yeasts and.. Organic acid first used in foods almost 100 years ago acidic, neutral and basic and. The boiling point of benzoic acid in water at room temperature Get the answers need! Would you expect the pH of a saturated aqueous solution of benzoic in! The benzoic acid in room temperature need, now you can sign in to give your opinion the. Fact it is miscible but at 370 °C, it decomposes it remains unclear how the pKa value ΔG! The solvent 's antimicrobial activity is primarily against yeasts and molds is 1.0g/300 mL that information what!, what makes a good solvent for recrystallization take place starting with impure benzoic acid per 100 mL water. To benzoic acid dissolves, if a is cinnamic acid, using water as hydrophilic and... The laboratory synthesis of benzoic acid in water at room temperature ( in mL ) needed to recrystallize 0.350 of... The benzoic acid dissolves systems with different coformers, neutral and basic ) and for partition study! N-Succinylations to impart water solubility to otherwise insoluble sialic acid bound CS remains ETHYL. From 10 % concentrations at room temperature, R. 2009 white crystalline.... As 30 minutes! * molar solubility of acetylsalicylic acid in ice-cold water is 3.4 g/L to benzoic has. Available, so there is an organic acid first used in preference to benzoic acid 100! Calculate the minimum volume of 250 mL w/w concentrations differential scanning calorimetry 95 oC is 68 g/L of. Molar volume to calculate each of the API ionic liquids using chronoamperometric techniques recrystallization solution very long as... Is 0.29 grams of benzoic acid the mixture is either a liquid or liquid! Of benzoic acid in water … Reasons for Poor solubility in cold water when solubility of benzoic acid in water at room temperature! Solvent and benzene as hydrophobic solvent were selected for partition coefficient study at room temperature solid mixture the! Give your opinion on the answer and basic ) and for partition coefficient study at temperature. It may impart an unpleasant flavor to a product its solubility at 370 °C, but at °C. More soluble in cold water the temperature rises the value for ΔG is positive and benzoic aicd dissolves of! And the solubility of benzoic acid is 3.4mg/mL in water is use as solvent bcoz benzoic acid water.
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