Question 5 -- / 1 Which of the following solutions is a good buffer system? a...

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Question 5 -- / 1 Which of the following solutions is a good buffer system? a solution that is 0.10 mol L-1 NaOH and 0.10 mol

Answer 1

Answer #1

acidic buffer is formed by weak acid and its conjugate base
basic buffer is formed by weak base and its conjugate acid

1)
NaOH is strong base and HNO3 is strong acid.
So, they cant be a buffer

2)
HNO3 is string acid and KNO3 is neutral salt.
So, they cant be a buffer

3)
HCN is weak acid and NaCl is neutral salt.
So, they cant be a buffer

4)
HCl is string acid and NaCl is neutral salt.
So, they cant be a buffer

5)
HCN is weak acid.
LiCN is its conjugate base.
They will form acidic buffer.

Answer: option 5

Answer 2

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