The dissociation constant of acetic is \(x\times {10}^{-5}\). When \(25\mathrm{mL}\) of \(0.2\mathrm{M}{\mathrm{CH}}_{3}…

The dissociation constant of acetic is \(x\times {10}^{-5}\). When \(25\mathrm{mL}\) of \(0.2\mathrm{M}{\mathrm{CH}}_{3}\mathrm{COONa}\) solution is mixed with \(25\mathrm{mL}\) of \(0.02\mathrm{M}{\mathrm{CH}}_{3}\mathrm{COOH}\) solution, the \(\mathrm{pH}\) of the resultant solution is found to be equal to 5 . The value of x is

[JEE Main 2023, 24 Jan (Shift 1)]