Are these correct?

1. Sodium borohydride is stable in acidic aqueous solutions.

True

False

2. When we add hydrochloric acid in the work up step to the reaction a gas is observed. What is the composition of the gas?

Nitrogen

water

Hydrogen

Carbon dioxide

Vanillin

3. When isolating the solid after recrystallization using vacuum filtration what solvent should you use to aid in the rinse from the Erlenmeyer flask to the vacuum filter funnel?

Cold ethanol

Cold water

Cold ethyl acetate

Hot water

Cold acetone

 

Select the name of the catalyst used for this reaction, if there was no catalyst used,   select none:

 

a. Sodium   borohydride

 

b. Sodium   hydroxide

 

c. Vanillin

 

d. None

 

Step2 HCI.H20 HO Complete the stiochiometry table using the starting values provided. Density (8/ml) Molecular Millimoles Equivalents mL Grams Reagent Weight 3.144 vanillin 14.535 sodium borohydride 23.598 sodium hydroxide (1 M aq.) theoretical product van illyl alcohol melting point of vanillyl alcohol