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We prepared a buffer prepared by combining 1.00 L of 0.60-M NaNO2 and 1.00 L of 0.40- M HNO2 (Ka= 4.0 x10-4).
Calculate the pH of the buffer.
If we add 10.0 mL 0.100-M HCl to 50.0 mL of the same buffer, what will be the resulting pH?
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