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`
Text Solution
Verified by Experts
The correct Answer is:
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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