Question

an aqueous solution contains equal concentration of benzoic acid and sodium benzoate. The pH of the solution is ? ( PKa of benzoic acid- 4.2 )​

Answer 1

Answer:

ph=4.2

Explanation:

ph=pk+log(salt/acid)

ph=pka+log(x/x) (equimolar)

ph=pka+log(1)

ph=pka+0 (log1=0)

ph= pka

therefore ph=4.2

Answer 2

Explanation:

refer to the attached page and that is log not sg .... sorry it was mistake there .... correct it