A solution containing `0.2` mole of dicholoracetice acid `(K_(a)=5xx10^(-2))` and0.1 mole sodium dicholoroacetate in one litre solution has `[H^(+)]` :

Options

A. `0.05M`
B. `0.025M`
C. `0.10M`
D. `0.005M`

Answer

1

Explanation

Since `CHCl_(2)COOH` is relatively strongs acid havings more `K_(a)`
`{:(CHCl_(2)COONa,rarr,CHCl_(2)COO^(-),+,Na^(+)),(,,0.1,,0.1),(CHCl_(2)COOH,hArr,CHCl_(2)COO^(-),+,H^(+)),(0.2,,0,,0),((0.2-x),,(x+0.1),,x):}`
`:. " "K_(a)=([CHCl_(2)COO^(-)][H^(+)])/([CHCl_(2)COOH])`
or `" "5xx10^(-2)=([0.1+x][x])/([0.2-x])`
`:." "x=0.05`