Question

A) How many milliliters of 0.15 M HCl would have to be added to 1.0 L of a buffer containing 0.25 M NH3 and 0.45 M NH4 to make the pH decrease by 0.05 pH unit? The Ka value = 5.6 x 10^-10.

B) How many milliliters of the same HCl solution would, if added to 0.204 L of pure water, make the pH decrease by 0.05 pH unit?

Answer 1

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