11. A beer has a pH of 4.30. What is the [H3O+]?
(a) 3.0 x 10+
(b) 2.0 x 10-4
(C) 2.0 x 10-5
(d) 5.0 x 10-5
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Explanation:
pH=−log[H
3
O
+
]=4.3
∴[H
3
O
+
]=10
−4.3
M=5×10
−5
M
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