How much sodium acetate should be added to 0.1m solution of CH_(3)C O O H to give a solution of pH 5.5 (pK_(a) "of" CH_(3)C O O H=4.5).

How much sodium acetate should be added to 0.1m solution of CH_(3)C O

1.	How much sodium acetate should be added to 0.1m solution of CH_(3)C O O H to give a solution of pH 5.5 (pK_(a) "of" CH_(3)C O O H=4.5).
Answer» 0.1 m 0.2 m 1.0 m 10.0 m Solution :`pH=pK_(a)+log .([CH_(3)CO ONa])/([CH_(3)CO OH])` `5.5=4.5+log .([CH_(3)CO ONa])/(0.1)` `=4.5 + log [CH_(3)CO ONa]+1` or` log [CH_(3)CO ONa]=0` `:. [CH_(3)CO ONa]=1M`