Which solution will have the highest ph? the ka of hclo is 3.8 × 10−8.(a) a solution of 100 ml of water with 20 ml of 0.1 m naoh added.(b) a 100 ml buffer solution of 0.1 m hclo, 0.1 mclo− with 20 ml of 0.1 m hcl solution added.(c) a buffer solution of 0.1 m hclo, 0.1 m clo−.(d) a 100 ml buffer solution of 0.1 m hclo, 0.1 m clo− with 20 ml of 0.1 m naoh solution added.

sol. with highest  pH is sol.of 100 mL of water with 20 mL  of 0.1 M NaOH

Explanation:

A solution of 100 ml of water with 20 ml of 0.1 M NaOH

we know that

0.1(20) = M_2(120)

pOH = 1.77

pH = 14 - 1.77 = 12.23

A buffer solution of [/tex]0.1 M HClO, 0.1 M ClO^{-}[/tex]

pH = 7.42

Additio of strong base will increase the pH of buffer sol. But increase in pH is veery small

Additio of strong base will increase the pH of buffer sol. But increase in pH is small

Additio of strong acid will lower the pH of buffer sol. But increase in pH is veery small

Therefore sol. with highest  pH is sol.of 100 mL of water with 20 mL  of 0.1 M NaOH

the answer is 75.0%.