Question

how many litres of water have been evaporated in confident rating 10 litre of H2 S o4 such that its pH decreases from 6 to 5
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Answer 1

Answer:

HEY MATE

Concentration of [H+] a pH 6 : [H+] = antilog (-pH) = antilog (-6) = 1 x 10-6 M

Concentration of [H+] a pH 5 : [H+] = antilog (-pH) = antilog (-5) = 1 x 10-5 M

Since the pH 6 is at the initial condition at which the volume was 10 L, then the volume at which the pH is 5 will be:

M1V1 = M2V2

1 x 10-6 M x 10 L = 1 x 10-5 M x V2

V2 = 1 L

Hence, the volume of water evaporated = 10 - 1 = 9 L

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