Question

A solution that is 22 m hc2h3o2 and .122 m kc2h3o2 find the ph

Answer 1

Hello!

To solve this problem we need to know the value of pKa for HC₂H₃O₂ (Acetic Acid) which is 4,76. Now we can apply the Henderson-Hasselbach equation, as follows (assuming that HC₂H₃O₂ concentration is 0,22M):


`pH=pKa + log ( (KC_2H_3O_2)/(HC_2H_3O_2) )=4,76 + log ( (0,122M)/(0,22M) )=4,50`

So, the pH for this buffer solution of HC₂H₃O₂ and KC₂H₃O₂ is 4,50

Have a nice day!