Question

at a given temperature, when acid is added to water then the value of Kw
a)decrease
b)increase
c)remains same
D)first decrease than increase
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Answer 1

Answer:

value of Kw a)decreases due to common in effect

Answer 2

When acid is added to water, concentration of H+ ions increase and OH- ions decrease. But the product of H+ and OH- ions remains constant.

Product of concentration of H+ and OH- ions is ionic product of water.(Kw)

So, Kw remains constant on addition of acid to water.

option (c) is correct.