26) Calculate the pH of 0.0385 M hypochloric acid [HClO]. [Ka= 3.0*10-8] explain answer please and...

Question

Question

26) Calculate the pH of 0.0385 M hypochloric acid [HClO]. [Ka= 3.0*10^-8]

explain answer please and show work

Answer 1

Answer #1

HClO ? H⁺ + ClO^-

Initial 0.0385 0 0

after dissocialtion 0.0385-x x x

Since Ka is very small so x will also be small.

So, 0.0385-x ?0.0385

Ka = [ClO^-][ H⁺]/[ HClO]

3*10^-8 = x*x/0.0385

x = squareroot(0.0385*3*10^-8)

x = 3.40*10^-5

pH = -log[H⁺]

= 4.46

Answer 2

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