Question

# When an aqueous solution contains both a weak acid (or weak base) and its conjugate base (or conjugate acid) it is called:

A
buffer
B
water
C
neutral acid
D
conjugate base

Solution

## The correct option is A bufferWhen an aqueous solution contains both a weak acid (or weak base) and its conjugate base (or conjugate acid) it is called a buffer solution. A solution whose $$pH$$ does not change very much when an acid (or base) is added to it. The capacity of the buffer is a measure of how much acid (or base) must be added to it to change the $$pH$$ by one unit.Chemistry

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