Question

The `pH` of a solution resulting from the addition of `12.5mL` of `0.1M HCl` to `50mL` of a solution containing 0.15M `CH_(3)COOH` & `0.2M` `CH_(3)COONa` will be (Given : `pK_(a)` of `CH_(3)COOH=4.74`)
A. `4.74`
B. `lt4.74`
C. `gt4.74`
D. `gt 9.26`

Answer 1

`{:(,CH_(3)COONa,+,HCl,rarr,CH_(3)COOH,+,NaCl),(t=0,10,,1.25,,7.5,,-),(t=eq,8.75,,0,,8.75,,-):}`
`pH=pK_(a)=4.74`