Question

You are given a dichloromethane solution containing compounds A,B, and C. You first extract with 3N...

You are given a dichloromethane solution containing compounds A,B, and C. You first extract with 3N NaOH and find that a salt of A is in the aqueous layer. Re‐extraction of the organic layer with 3N HCl leaves only C in the organic layer. Of the following, compound A is probably: a. hexane b. benzoic acid c. naphthalene d. sodium sulfate e. benzocaine

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

The dichloromethane layer containing the three compounds was first extracted with 3 N NaOH solution and the salt of compound A was found in the aqueous layer. NaOH is a strong base and will react with both strong and weak acids to form a salt. The salt is definitely ionic, since sodium atom has a strong tendency to ionize; therefore, the salt is soluble in water due to ion-dipole interactions.

Of the given organic compounds, only (b) benzoic acid is an acid and will react with NaOH to form sodium benzoate, an ionic salt soluble in water. The reaction is as below.

C6H5CO2H (aq) + NaOH (aq) --------> C6H5CO2-Na+ (aq) + H2O (l)

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You are given a vial containing a mixture of the following compounds 1-naphthol Benzoic acid Butyl...
You are given a vial containing a mixture of the following compounds 1-naphthol Benzoic acid Butyl acetate Indole Assume the compounds are soluble in (diethyl)ether and have limited (slight) water solubility. Plan the separation of the compounds by extraction. You have a separatory funnel, your lab drawer, shared equipment, and the following reagents to use Ether 5% NaOH 10% NaHCO3 5% HCl 12M HCl 6M NaOH Na2SO4(s) 1.Describe the plan in words. Outline or describe the extraction(s) needed to separate...
1. When you added the aqueous base to the ether solution of the mixture (naphthalane and...
1. When you added the aqueous base to the ether solution of the mixture (naphthalane and benzoic acid), TWO important things happened that resulted in extraction of the benzoic acid into the aqueous phase, what were they? 2. Very often organic solutions are washed with brine, which is a concentrated solution of sodium chloride (salt) in water. If a solution of carbon tetrachloride as the organic solvent is washed with brine and the organic and aqueous solutions allowed to settle,...
We need to make a flow chart, then use extraction and recrystallization to isolate component to...
We need to make a flow chart, then use extraction and recrystallization to isolate component to purify. What should we use as a solvent to spot on a thin layer chromatography silica plate? , Solvents: acetone, ethanol, methanol, ethyl acetate, hexanes, dichloromethane Aqueous solutions: 1M NaOH, 1M HCl, 3M NaOH, 3M HCl, 1 M NaHCO3, saturated NaCl Drying Agent: sodium sulfate During an oxidation of benzyl alcohol to benzoic acid, a student did not have adequate time during the lab...
Your experiment consists of three stages: Separation, Recovery, and Purification. In the Separation stage, you are...
Your experiment consists of three stages: Separation, Recovery, and Purification. In the Separation stage, you are physically separating three compounds, a carboxylic acid, a phenol, and a neutral compound. In the procedure, which compound is separated first? Question 6 options: neutral carboxylic acid phenol 1. The purpose of RECOVERY is to change the chemical form of the extracted components back to its original molecular form. What reagent is added to recover the carboxylic acid and phenol from the aqueous layer?...
The substances given are 50% benzoic acid, 40% benzoin, and 10%1,4-dibromobenzene. I need a seperation scheme,...
The substances given are 50% benzoic acid, 40% benzoin, and 10%1,4-dibromobenzene. I need a seperation scheme, i know i have to use extraction and recrytallization to seperate each. I am just confused which substances to use, the solvents available are water, 1.0M NaOH, 6.0m NaOH, 1.0M HCl, 6.0M HCl, 1M NaHCO3, saturated aq sodium chloride, dichloromethane, diethyl ether, 95% ethanol, methanol, isopropyl alcohol, acetone, hexane, and toluene. thank you for any help!
Separation of Acidic, Basic, and Neutral Compounds: This is for an Ochem Lab. 1st-8th is just...
Separation of Acidic, Basic, and Neutral Compounds: This is for an Ochem Lab. 1st-8th is just the steps of the procedure we followed and the question corresponds to the 8th step in the procedure;​ In the first portion of the experiment, what is the purpose of washing the dichloromethane (layer C) with two 15 mL portions of water? Background : A mixture containing acidic, basic, and neutral compounds can be separated by acidic and basic properties. Commercial headache tablets, such...
For questions 7 and 8, imagine that we dissolve a mixture of the compounds (3-nitrobenzoic acid,...
For questions 7 and 8, imagine that we dissolve a mixture of the compounds (3-nitrobenzoic acid, 2-naphthol, and 1,4-dimethoxybenzene) in diethyl ether. We then add aqueous sodium hydroxide into the mixture and place the solution into a column. 7. Which layer will elute first? A. Aqueous B. Organic C. Other (Specify) _________________________ 8. Which compounds (if any) would you expect to find in the first layer to elute from the column? (Circle all that apply) A. 3-nitrobenzoic acid B. 2-naphthol...
You are given a solution containing two compounds ( A and B). Compound A is more...
You are given a solution containing two compounds ( A and B). Compound A is more polar than compound B. You make one spot of this solution on silica coated Plate 1 and one spot of this solution on silica coated Plate 2. Plate 1 is developed with very polar Solvent X. Plate 2 is developed with moderately polar Solvent Y. Draw a diagram that shows the positions of compounds A and B in the single lane on Plate 1...
What is the solid product formed from the following series of reactions? You are given a...
What is the solid product formed from the following series of reactions? You are given a mystery compound containing copper. To find its identity you perform the following steps: a. Dissolve the compound (salt) in an aqueous solution of dissolved water. b. Next, you add a strong acid (HCl). c. Lastly, you add Mg2+(s) to facilitate a redox reaction turning the Cu2+(aq) to Cu(s). The copper is now solid. What is the identity of this solid product?
Add 7.0 mL of N,N-dimethylaniline and 50 mL of dichloromethane (CH2Cl2, DCM) to a 400- mL...
Add 7.0 mL of N,N-dimethylaniline and 50 mL of dichloromethane (CH2Cl2, DCM) to a 400- mL beaker. Place the beaker in an ice-water bath. Add a magnetic stir bar and thermometer. Clamp the thermometer in place. Turn on the stirring motor. Add 1.1 equivalents of a solution (~1 M) of bromine (Br2) in DCM (already prepared in the hood) with a plastic disposable pipet. If the temperature of the solution rises above 25 °C stop adding bromine solution. Allow the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT