Question

please answer highest buffering capacity

Which of the following has the highest buffering capacity? O 1 L of 0.9 M CO32- and 0.1 M HCO3- 1 L of 0.1 M CO32- and 0.9 M HCO3- 1 L of 0.9 M CO32- and 0.9 M HCO3- 1 L of 0.1 M CO32- and 0.1 M HCO3

Answer 1

Answer: C

Let's first understand the buffer and buffer capacity.

Buffer is a solution that resist pH change.(Generally contain weak acid or weak base and their conjugate base and acid).

Buffer capacity quantifies the buffer resistance towards pH change on addition of acid or base.

Equal amount of conjugate acid and base in buffer generally have higher buffer capacity.

So according to this concept we have have 2 options in our favor (C and D).

But highly concentrated buffer always resist pH change to greater extent.

So out of option C and D .

Option C is has higher as well equal amount of conjugate acid and base concentration.

So option C is correct.

Highly concentrated