Answer to Question #212040 in Physical Chemistry for Arvin

Question

You are asked to prepare a buffer solution with a pH of 3.50. The following solutions, all 0.100 M, are available to you: HCOOH, CH₃COOH, H₃PO₄ , NaCHOO, NaCH₃COO, and NaH₂PO₄. 

What would be the best combination to make the required buffer solution?

Select one:

a.

NaH₂PO₄ and HCOOH

b.

H₃PO4 and NaH₂PO₄

c.

CH₃COOH and NaCH₃COO

d.

NaH₂PO₄ and NaCHOO  

e.

HCOOH and NaCHOO

Answer 1

a) NaH2PO4 and HCOOH