Question

Which of the following solutions is a good buffer system? which of the following solutions is a good buffer system? a solution that is 0.10 m hcn and 0.10 m nacl a solution that is 0.10 m hcn and 0.10 m licn a solution that is 0.10 m hno3 and 0.10 m kno3 a solution that is 0.10 m naoh and 0.10 m hno3 a solution that is 0.10 m nacl and 0.10 m hc?

Answer 1

Answer:

A solution that is 0.10 M HCN and 0.10 M LiCN

Explanation:

A buffer is defined as the mixture of a weak acid with its conjugate base or vice versa. Thus:

A solution that is 0.10 M HCN and 0.10 M NaCl. IS NOT A BUFFER. The HCN is a weak acid but its conjugate base is CN⁻ that is not present in that solution.

* A solution that is 0.10 M HCN and 0.10 M LiCN. IS A BUFFER. The LiCN dissolves in water forming CN⁻, the conjugate base of HCN

A solution that is 0.10 M HNO₃ and 0.10 M KNO₃. IS NOT A BUFFER. HNO₃ is a strong acid, not a weak acid.

A solution that is 0.10 M NaOH and 0.10 M HNO₃. IS NOT A BUFFER. NaOH is a strong base and HNO₃ is a strong acid.

A solution that is 0.10 M NaCl and 0.10 M HCl. IS NOT A BUFFER. HCl is a strong acid.

I hope it helps!

Answer 2

Buffer is formed from weak acid and its salt with strong base (conjugate base) so the correct answer will be 0.1 M HCN and 0.1 M LiCN and all other choices are incorrect