Determining the molar concentration...

Question

1. A water solution has the pH = 10.00, Determine the molar concentration of H3O+ in this solution.
2. Determine the molar concentration of OH− in this solution.
3. Consider a neutral water solution, determine the molar concentration of H3O+ in this solution.
4. Determine the molar concentration of OH− in this solution. And what is the pH?
5. Consider a water solution with molar concentration of H3O+ =6.4×10−12. Determine the molar concentration of OH− in this solution. And what is the pH?
6. Consider a water solution with pH = 11.3, determine the molar concentration of H3O+ in this solution.
7. Determine the molar concentration of OH− in this solution.



Answer 1

1). pH = -log [H₃O] = 10

[H₃O] = 1x10^-10 M

2). [OH-] = 10^-14/10^-10 = 10^-4 M

3). Neutral pH = 7, thus [H₃O] = 1x10^-7

4) [OH-] = 1x10^-7

You should be able to do tge rest.