Question

What is the pH react with Amino acids and Ninhydrin? a. pH=4 b. pH=2 c. pH=7 d. pH=3

Answer 1

Answer: c. pH= 7

Explanation:

the pH value of Ninhydrin is approximately 5.5 and it has a basic character

pH value of amino acids differs from one to another but it has an acidic character

so when a base and acid react we know that the solution becomes neutral

here when both of these react Ruhlmann's purple is formed and its pH value range from 5-7.

so here given options when we check it can be 7

hope this will help you :)