Asked by danny
The Ka of hypochlorous acid (HClO) is 3.00×10-8 at 25.0°C. Calculate the pH of a 0.0385 M hypochlorous acid solution.
A.1.41
B.7.52
C.-1.41
D.4.47
E.8.94
I chose B
A.1.41
B.7.52
C.-1.41
D.4.47
E.8.94
I chose B
Answers
Answered by
DrBob222
B isn't right and you should know not to pick that. pH of 7.51 is basic and this is an acid. If you will show your work I will find where you went wrong.
Answered by
danny
I think i figured it out
0.0385
change
-x. . . . .. . +x. . . .+x
at equilibrium
0.0385-x. .. x..... . .x
Ka = 3.0 x 10^-8 = [H+][ClO-]/ [HClO]= (x)(x)/ 0.0385-x
x = [H+]= 3.4 x 10^-5 M
pH = - log 3.4 x 10^-5=4.5
Im going with D now
0.0385
change
-x. . . . .. . +x. . . .+x
at equilibrium
0.0385-x. .. x..... . .x
Ka = 3.0 x 10^-8 = [H+][ClO-]/ [HClO]= (x)(x)/ 0.0385-x
x = [H+]= 3.4 x 10^-5 M
pH = - log 3.4 x 10^-5=4.5
Im going with D now
Answered by
DrBob222
D is right.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.