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pH of 1L of aqueous solution of HCL is 1,then what amount of water to be added to change pH to 2?

pH of 1L of aqueous solution of HCL is 1,then what amount of water to be added to change pH to 2?

Grade:11

1 Answers

Pankaj
askIITians Faculty 131 Points
9 years ago
Molarity of HCl at 1 pH
pH = -log[H+]
1 = -log10[H+]
or [H+] = 0.1
Similarly
Molarity of HCl at pH 2 = 0.02
Now
M1V1 = M2V2
or
1 x 0.1 = 0.01 x V2
or
V2 = 10
So, amouth of water atted = V2-V1 = 10-1 – 9 L

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