Saturday
November 29, 2014

Homework Help: Chem

Posted by Jessica on Wednesday, December 8, 2010 at 1:34pm.

Please tell me if these are right!

What are the [H3O+] and [OH-] for a solution with the following pH values?

a. 10.0 I got 1.0*10^-10 for [H3O+] and 1.0*10^-4 for [OH-]

b. 5.0 I got 1.0*10^-5 for [H3O+] and 1.0*10^-9 for [OH-]

c. 7.00 I got 1.0*10^-7 for [H3O+] and1.0*10^-7 for [OH-]

d. 6.5 I got 3.2*10^-7 for [H3O+] and 3.125*10^-8 for [OH-]

e. 1.82 I got 1.5*10^-2 for [H3O+] and 6.7*10^-12 for [OH-]

Solution X has a pH of 9.5 and solution Y has a pH of 7.5.

b. what is the [H3O+] in each?
I got 3.2*10^-10 for [H3O+] and 3.125*10^-5 for [OH-] for 9.5

c. what is the [OH-] in each?
I got 3.2*10^-8 for [H3O+] and 3.125*10^-7 for [OH-] for 7.5.
Thank you so much!

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