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On adding which of the following the pH ...

On adding which of the following the pH of 20 mL of 0.1 N HCl will not alter ?

A

1 mL of 1 N HCl

B

20 mL of distilled water

C

1 mL of 0.1 N NaOH

D

500 mL of HCl of pH = 1.

Text Solution

Verified by Experts

The correct Answer is:
D
pH of 20 mL of `0.1 N HCl = -log [H^(+)]`
`=-log (0.1)=1`
The given solution has pH = 1
`therefore` When 500 mL of HCl of pH = 1 is added to the given solution, pH remains same.
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