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3 years ago

Select the statements that correctly describe buffers.

Chemistry

1 answer:

VARVARA [1.3K]3 years ago

6 0

Answer:

B) The pH of a buffer solution does not change significantly when a small amount of acid is added.

C) The pH of a buffer solution is determined by the ratio of the concentration of acid to the concentration of base.

Explanation:

Buffer solution is useful in maintaining the pH of a solution constant . It is made of a weak acid and its salt or a weak base and its salt . Ph of a buffer is given by the following relation .

pH = pKa + log [ A⁻ ] / [ HA ]

A- is a base and HA is a weak acid .

When we add acid , it reacts with A⁻ or base and gets neutralised .

When we add base , it reacts with acid HA and gets neutralised . In this way it maintains the pH of the solution .

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