which of the following substances could be used to make a buffer solution when added to a solution of HCN? A) HBr B) L...

Question

Question

which of the following substances could be used to make a buffer solution when added to a solution of HCN?

A) HBr

B) LiCN

C) LiOH

D) H2CO3

E) LiBr

Answer 1

Answer #1

HCN is acid.

To make buffer, we would need conjugate base of HCN in solution.

Conjugate base of HCN is CN- which is present in LiCN

So, LiCN can be added to make a buffer.

Answer: B

Answer 2

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