Question

Which combination will make a buffer?

A. NaOH and NaCl
B. KOH and KCl
C. HCl and NaCl
D. CH3COOH and CH3COONa

Answer 1

well what is a buffer?

Answer 2

Buffer is made from a weak acid or base combined, right? so.... we need know what our strong acids and bases are from memorization.

Answer 3

So would it be C since its an acid and a base?

Answer 4

Can not be A because, No, NaOH is a strong base and NaCl is the salt of a strong acid and a strong

Can not be B because, KCl is a strong base vs a weak acid.

It can not be C because, HCl is a strong acid and NaOH is a strong base; their salt, NaCl, therefore has no buffering ability.

So we are left with: D. CH3COOH and CH3COONa is the correct answer

You are going to need to memorize the strong acids/strong bases.

Answer 5

@aaggaa Close, but D is correct answer :P Good effort.

Answer 6

Aww haha thank you for the thorough information!! :)