1. Which would be a safety concern when handling the sodium hydroxide solution u

Question

1. Which would be a safety concern when handling the sodium hydroxide solution used in this experiment?

a. do not mix with water

b. keep away from open flames

c. wear lab gloves

d. use only under chemical hood

2.What is the function of hexane in this experiment of friedel-craft reaction?

a. oxidizing agent

b. solvent of the reaction

c. TLC developing solvent

d. reducing agent

3. BHT and BHA are similar in structure. In what major way would the IRs for these two compounds differ?

a. BHA would have a major peak in the 1270-1200 cm-1 range which would be absent in the IR for BHT.

b. There would be no difference in the IRs for these two compounds since they are so similar in structure.

c. BHA would have a major peak around 1715 cm-1 which would be absent in the IR for BHT.

d. BHA would have a major peak around 3500 cm-1 which would be absent in the IR for BHT.

4. What might be the result of you had used 10.0 mL of water and no diethyl ether in the extraction step?

a. no product would be form from the reaction

b. the product would percipiate from the solution

c. any product formed would be converted to p-cresco

d. the product would not be separated from the aqueous phase

Explanation / Answer

1) the use of sodium hydroxide should be made only after wearing lab gloves. We do prepare its solution in water and there will be no danger if it comes in contact with water. No fumes are evolved from it so no safety hood is required.IT is not highly inflammable even.

Answer : wear lab gloves

2) Hexane is used as solvent in Friedal craft. We need non polar solvent for the reaction which should not undergo electrophilic substitution reactions ( so we can not use benzene)

3) BHT is Butylated hydroxytoluene: It lacks the O-CH3 group

BHA is Butylated hydroxyanisole : It contains O-CH3 group so will show the C-O stretch i between 1200 and 1270.

4) the experiment is not given

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