1. If all the impurities in a certain sample are soluble in the solvent being used, would it be necessary to do a hot filtration? Explain why or why not. 2. Use the following solubility data to answer all parts of this question. You can assume that the presence of one compound in solution does not affect or change the solubility of another compound in that same solution. Compound Benzoic acid Impurity Solubility in water at 25°C 0.34 grams per 100 mL of water 0.50 grams per 100 mL of water A. Will 5.7 grams of benzoic acid dissolve in 100 mL of water at 95°C? B. If 4.50 grams of benzoic acid are dissolved in 100 mL of hot water and then allowed to cool to 25°C followed by vacuum filtration, how many grams of benzoic acid crystals would be obtained? Show your work. Solubility in water at 95°C 6.81 grams per 100 mL of water 4.25 grams per 100 mL of water What percentage of the original benzoic acid sample is this? In other words, what is your percent recovery of benzoic acid crystals? Show your work. I to 224

1. If all the impurities in a certain sample are soluble in the solvent being used, would it be necessary to do a hot filtration? Explain why or why not. 2. Use the following solubility data to answer all parts of this question. You can assume that the presence of one compound in solution does not affect or change the solubility of another compound in that same solution. Compound Benzoic acid Impurity Solubility in water at 25°C 0.34 grams per 100 mL of water 0.50 grams per 100 mL of water A. Will 5.7 grams of benzoic acid dissolve in 100 mL of water at 95°C? B. If 4.50 grams of benzoic acid are dissolved in 100 mL of hot water and then allowed to cool to 25°C followed by vacuum filtration, how many grams of benzoic acid crystals would be obtained? Show your work. Solubility in water at 95°C 6.81 grams per 100 mL of water 4.25 grams per 100 mL of water What percentage of the original benzoic acid sample is this? In other words, what is your percent recovery of benzoic acid crystals? Show your work. I to 224

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter2: Crystallization

Section: Chapter Questions

Problem 3Q

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1. The Ksp of Ca3(PO4)2 is 1.3 × 10−26. Estimate the solubility of this salt in units of g. L−12. If a sample of solid Ca3(PO4)2 is stirred into exactly one litre of a 0.550M solution of Na3PO4, how will the solubility of the salt compare with the answer that you have obtained in question 2.1? Explain you answer in a short sentence. Please only answer 2nd Question
A mixture consisting of 15 mole % Phenol in water is to batch distilled at 260 torr, what fraction of the original batch is remains in the still when the total distillate contain 98mole % w water? What is the residues concentration?
Find how many % of I2 in 1000 mL H2O will still be in its aqueous phase if it was extracted with CHCl3 for a single time. Note: Suppose that KD is 160.
1. The Ksp of Ca3(PO4)2 is 1.3 × 10−26. Estimate the solubility of this salt in units of g. L−12. If a sample of solid Ca3(PO4)2 is stirred into exactly one litre of a 0.550M solution of Na3PO4, how will the solubility of the salt compare with the answer that you have obtained in question 2.1? Explain you answer in a short sentence.
5 Using the ternary phase diagram below, determine if the following mixture falls on the single-phase region or the two-phase region. If it falls under the two-phase region, determine the concentration of the raffinate and extract phase at equilibrium. Make a summary table and label them as extract and raffinate with the corresponding concentrations. Plot the point in the diagram for each of the mixture Conclude what happens to the mixture at equilibrium. 30% A; 34% B; 36% C
profile-image Time remaining: 00 : 09 : 27 Chemistry A group was given the responsibility of performing a recrystallization experiment in their laboratory to see if the three newly found solvents could purify and separate a mixture including compounds A and B. The following are the solubilities of the two compounds in g/100 mL of hot and cold solvents:Solubility in g/100 mL solvent A B B Solvent Hot Cold Hot Cold 1 4.60 1.10 5.30 1.90 2 6.40 5.80 8.40 1.10 3 3 9.70 3.30 6.80 What is the %recovery and %purity of A and B in the chosen solvent? Show solutions pls
Pls do fast within 5 minutes and i will give like for sure Solution must be in typed form To plan a liquid–liquid extraction we need to know the solute’s distribution ratio between the two phases. One approach is to carry out the extraction on a solution that contains a known amount of solute. After the extraction, we isolate the organic phase and allow it to evaporate, leaving behind the solute. In one such experiment, 1.235 g of a solute with a molar mass of 117.3 g/mol is dissolved in 10.00 mL of water. After extracting with 5.00 mL of toluene, 0.889 g of the solute is recovered in the organic phase. If we extract 20.00 mL of an aqueous solution that contains the solute using 10.00 mL of toluene, what is the extraction efficiency?
plz help with the last three (ksp, average ksp,solubility)
Part b As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon is dissolved in 1 M acetic acid for technical reasons having to do with its production. You have determined that the solubility product Ksp of Herbigon is 9.00×10-6 Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH COO, where "X" represents the top-secret cation of the salt). It is this cation that kills weeds. Since it is critical to have Herbigon dissolved (it won't kill weeds as a suspension), you are working on adjusting the pH so Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X* is 4.00×10-3 M? The pKa of acetic acid is 4.76.
Suppose you have a mixture of copper sulfate (CuSO4) and azulene (C10H8, you may wish to know the structure of azulene). Both copper sulfate and azulene are beautiful deep blue cystalline solids. If you transferred the mixture to a separatory funnel containing both an aqueous and and organic solvents (1M HCl and dichloromethane), into which layer would the copper sulfate partition, aqueous or organic? Aqueous layer (1M HCl) Organic layer (dichloromethane) Copper sulfate would partition nearly equally into both the aqueous and organic layers
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TypeFormulaKsp Solubility Product Constants (Ksp at 25 oC) TypeFormulaKspBromidesPbBr26.3 × 10-6AgBr3.3 × 10-13CarbonatesBaCO38.1 × 10-9CaCO33.8 × 10-9CoCO38.0 × 10-13CuCO32.5 × 10-10FeCO33.5 × 10-11PbCO31.5 × 10-13MgCO34.0 × 10-5MnCO31.8 × 10-11NiCO36.6 × 10-9Ag2CO38.1 × 10-12ZnCO31.5 × 10-11ChloridesPbCl21.7 × 10-5AgCl1.8 × 10-10ChromatesBaCrO42.0 × 10-10CaCrO47.1 × 10-4PbCrO41.8 × 10-14Ag2CrO49.0 × 10-12CyanidesNi(CN)23.0 × 10-23AgCN1.2 × 10-16Zn(CN)28.0 × 10-12FluoridesBaF21.7 × 10-6CaF23.9 × 10-11PbF23.7 × 10-8MgF26.4 × 10-9HydroxidesAgOH2.0 × 10-8Al(OH)31.9 × 10-33Ca(OH)27.9 × 10-6Cr(OH)36.7 × 10-31Co(OH)22.5 × 10-16Cu(OH)21.6 × 10-19Fe(OH)27.9 × 10-15Fe(OH)36.3 × 10-38Pb(OH)22.8 × 10-16Mg(OH)21.5 × 10-11Mn(OH)24.6 × 10-14Ni(OH)22.8 × 10-16Zn(OH)24.5 × 10-17IodidesPbI28.7 × 10-9AgI1.5 × 10-16OxalatesBaC2O41.1 × 10-7CaC2O42.3 × 10-9MgC2O48.6 × 10-5PhosphatesAlPO41.3 × 10-20Ba3(PO4)21.3 × 10-29Ca3(PO4)21.0 × 10-25CrPO42.4 × 10-23Pb3(PO4)23.0 × 10-44Ag3PO41.3 × 10-20Zn3(PO4)29.1 ×…