Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula pH = -log[H3O+], as needed.
Find [H3O+] if the pH = 1.4.
4.0 x 10-1
2.5 x 10-1
4.0 x 10-2
2.5 x 10-2
We know that
pH = - log[H3O+]
Given, pH = 1.4
=> - log[H3O+] = 1.4
=> log[H3O+] = - 1.4
=> [H3O+] = 10-1.4
=> [H3O+] = 0.04
=> [H3O+] = 4.0 * 10-2
Therefore,
[H3O+] = 4.0 * 10-2
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