How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2?

2.0 L

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9.0 L

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10 L

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0.9 L

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Solution

The correct option is B
9.0 L

$M_{e q} o f H C l = M_{e q} o f I I H C l 1 \times 10^{- 1} = V \times 10^{- 2} V = 10 L$
Vol. of water added = 10-1=9L

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