What would be wrong with simply evaporating the solvent (instead of vacuum filtering the solvent from...
What would be wrong with simply evaporating the solvent (instead of vacuum filtering the solvent from the crystals) once the crystals have been formed
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What would be wrong with simply evaporating the solvent (instead
of vacuum filtering the solvent from...
Explain why one would recrystallize a solid from a solvent pair instead of a single solvent....
Explain why one would recrystallize a solid from a solvent pair instead of a single solvent. Explain how it works in terms of solubilities.
By evaporating the solvent from the extract, she determines that there is only 0.124 g of...
By evaporating the solvent from the extract, she determines that there is only 0.124 g of acid per 10.0 mL of plant extract. What is the ka value for the acid? What is the pH of the plant extract? What is the pH after the following information, calculate the solubility product of AgCN. Calculate the solubility if the pH = 4.75 and the [HCN] is 0.130 M, and the pK_a for HCN is 9.31.
If methylene chloride was used as the organic solvent in solvent extraction, instead of ether, what...
If methylene chloride was used as the organic solvent in solvent
extraction, instead of ether, what would the top layer be in the
separation step? This is in reference to a Solvent Extraction
experiment.
If methylene chloride was used as the organic solvent in solvent extraction, instead of ether, what would the top layer be in the separation step? 12pt v Paragraph v B I U Av Av Tev :
1. will a Grignard reagent be formed if acetone is used as solvent instead of diethyl...
1. will a Grignard reagent be formed if acetone is used as solvent instead of diethyl ether. (reaction of bromobenzene with magnesium) 2. what is the product if reacting benzaldehyde with the Grignard reagent from Q1 in acetone?
Okay, my answer is wrong, but what is the correct answer and why. Attempt 1 Feedback...
Okay, my answer is wrong, but what is the
correct answer and why.
Attempt 1 Feedback Select the statement that will help produce more pure crystals during recrystallization. Incorrect Seed the solution with the solid product that forms on the spatula While it is important that the solid Make sure that the solid dissolves completely in the cold solvent dissolves in hot solvent rather than Add a little extra solvent after the crystals have completely dissolved. melting, this will not...
1. In order for a solution to generate heat when irradiated by microwaves the solvent must...
1. In order for a solution to generate heat when irradiated by
microwaves the solvent must have?
2. Identify what the solvent is for this reaction. Draw its
structure.
cetyl anthranilic acid into a large, dry, test tube place 0.68 g of anthranilic acid, 2.2 mL of acetic anhydride and a Doung chip. Upon the addition of the acetic anhydride the tube may become warm. Swirl the tubo brany to mix the reagents. Place the tube into a beaker. Place...
When preparing for an important synthesis you attempt to recrystallize a starting material from benzene. You...
When preparing for an important synthesis you attempt to recrystallize a starting material from benzene. You start off by dissolving 4g of material in 100 mL of boiling benzene. Thereafter filtering off some insoluble impurities, you allow the solution to cool to room temperature. You then cover the flask, and put it in the freezer for a couple hours. When you return, you expect to find beautiful needle-like crystals, but instead you instead find a clear solution with no precipitate....
3. Instead of trying to isolate the more soluble (S)-aminium-(S)-malate diastereomers from the mixture of diastereomeric...
3. Instead of trying to isolate the more soluble (S)-aminium-(S)-malate diastereomers from the mixture of diastereomeric salts, what would be a better way of ensuring that the (S)-(-)-amine diastereomeric salt crystallizes preferentially as the less soluble crystals? Hint: What is the enantiomer of the (R)-aminium-(S)-malate diastereomer and how could it be formed?
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
why is it wrong to say that a solute is "broken down" by a solvent? why...
why is it wrong to say that a solute is "broken down" by a
solvent?
why do you think a waxy substance such as lauryl myristate
make such an effective barrier too water?
what solvents would you choose to clan up a spot of lauryl
myristate?
Explain the differences between hydrogen bonds and covalent C-H bonds 1. Why is it wrong to say that a solute is "broken down" by a solvent? 2. 3. Lanolin (obtained from sheep wool) is...
By evaporating the solvent from the extract, she determines that there is only 0.124 g of acid per 10.0 mL of plant extract. What is the ka value for the acid? What is the pH of the plant extract? What is the pH after the following information, calculate the solubility product of AgCN. Calculate the solubility if the pH = 4.75 and the [HCN] is 0.130 M, and the pK_a for HCN is 9.31.
If methylene chloride was used as the organic solvent in solvent
extraction, instead of ether, what would the top layer be in the
separation step? This is in reference to a Solvent Extraction
experiment.
If methylene chloride was used as the organic solvent in solvent extraction, instead of ether, what would the top layer be in the separation step? 12pt v Paragraph v B I U Av Av Tev :
Okay, my answer is wrong, but what is the
correct answer and why.
Attempt 1 Feedback Select the statement that will help produce more pure crystals during recrystallization. Incorrect Seed the solution with the solid product that forms on the spatula While it is important that the solid Make sure that the solid dissolves completely in the cold solvent dissolves in hot solvent rather than Add a little extra solvent after the crystals have completely dissolved. melting, this will not...
1. In order for a solution to generate heat when irradiated by
microwaves the solvent must have?
2. Identify what the solvent is for this reaction. Draw its
structure.
cetyl anthranilic acid into a large, dry, test tube place 0.68 g of anthranilic acid, 2.2 mL of acetic anhydride and a Doung chip. Upon the addition of the acetic anhydride the tube may become warm. Swirl the tubo brany to mix the reagents. Place the tube into a beaker. Place...
3. Instead of trying to isolate the more soluble (S)-aminium-(S)-malate diastereomers from the mixture of diastereomeric salts, what would be a better way of ensuring that the (S)-(-)-amine diastereomeric salt crystallizes preferentially as the less soluble crystals? Hint: What is the enantiomer of the (R)-aminium-(S)-malate diastereomer and how could it be formed?
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
why is it wrong to say that a solute is "broken down" by a
solvent?
why do you think a waxy substance such as lauryl myristate
make such an effective barrier too water?
what solvents would you choose to clan up a spot of lauryl
myristate?
Explain the differences between hydrogen bonds and covalent C-H bonds 1. Why is it wrong to say that a solute is "broken down" by a solvent? 2. 3. Lanolin (obtained from sheep wool) is...
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