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How many litres of water must be added to 2 litre aqueous solution of `HCI` with a `pH` of 1 to create an aqueous solution with `pH` of 2 ?A. `10L`B. `0.9L`C. `2L`D. `18L` |
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Answer» Correct Answer - D How many liters of water …….. `pH = 1 implies [H^(+)]=10^(-1)=0.1M` `pH=2 implies [H^(+)] = 10^(-2) = 0.01M` for dilution of `HCI M_(1)V_(1) = M_(2)V_(2)` `0.1xx2=0.01xxV_(2)` `V_(2) = 20L` Volume of water added `= 20 - 2 = 18` litre |
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