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The Ka of a monoprotic weak acid can be determined by mixing 100.0 mL 0.150 M of this weak acid and 50.0 mL 0.150 M NaOH solution. If the pH of such mixture is 4.50, calculate the Ka of this acid
4.50
1.26 x 10-4
3.16 x 10-5
0.00450
3.16 x 10-6
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