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Finding [H+] and pH of a solution.

Find out [H+] and the pH of the following solutions:
a. 0.60 M HCl [H3O+] = ____________ pH = ____________

b. A solution made by dissolving 75.0g HNO3 in water to make 2.00L of solution.
[H3O+] = ____________ pH = ____________ 

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