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what is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and...

what is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and 25.00 mL of 12 M NH3 in enough water to make 1.000 L of solution? Kb=1.80 x 10^-5 for NH3. calculate the change in pH after addition of 50.0 mL of 0.15M NaOH.

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