Problem: What mass of ammonium chloride, NH 4Cl, (Ka = 5.6 x 10 -10) must be added to exactly 500mL of 0.10M NH3 solution to give a solution with a pH of 9.00?

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What mass of ammonium chloride, NH 4Cl, (Ka = 5.6 x 10 -10) must be added to exactly 500mL of 0.10M NH3 solution to give a solution with a pH of 9.00?

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