Find the change in pH when `0.01` mole `CH_(3)COONa` is added to one litre of `0.01 M CH_(3)COOH` soluton `(pK_(a) = 4.74)`

Find the change in pH when 0.01 mole CH_(3) COONa is added to one litre 0.01 M CH_(3) COOH solution (pK_(a) = 4.74)

pK_(a) of CH_(3)COOH is 4.74 . The pH of 0.01 M CH_(3)COONa IS

What amount of CH_(3)COONa is to be added to one litre of 0.1(M) CH_(3)COOH solution so that the pH becomes 4.0? [K_(a)=1.8xx10^(-3)] .

How much CH_3COONa should be added to 1 litre of 0.1 M CH_3COOH to make a buffer of pH=4.0 ? K_a=1.8xx10^(-5)

What amount of CH_3COONa is to be added to one litre of 0.1 (M) CH_3COOH soluton so that the pH becomes 4.0? [ K_a = 1.8 xx 10^-3 ]