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Find DeltapH when 100 ml of 0.01 M HCl i...

Find `DeltapH` when 100 ml of 0.01 M HCl is added in a solution containing 0.1 m moles of `NaHCO_(3)` solution of negligible volume. `(Ka_(1)=10^(-7), Ka_(2)=10^(-11)` for `H_(2)CO_(3))`

A

6+2 log3

B

6-log3

C

6+2log2

D

6-2log3

Text Solution

Verified by Experts

The correct Answer is:
A
pH of `NaHCO_3` solution =9 (initial)
Now `H^+ + HCO_3^(-) to H_2CO_3`
`:.` no . of mmole of HCl remaining =1-0.1=0.9 mmole
`:.` pH=-log `(9xx10^(-3))=-2 log 3+3` (Final)
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