What mass of ammonium nitrate must be added to 350.mL of a 0.150 M solution of ammonia to give a buffer having a pH of 9.00? (K_b(NH₃)= 1.8 × 10^-5)

Name: What mass of ammonium nitrate must be added to 350.mL of a 0.150 M solution of ammonia to give a buffer having a pH of 9.00? (K b (NH 3 )= 1.8 × 10 -5 )
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The correct answer is A because the mass of ammonium nitrate that must be added to 350.mL of a 0.150 M solution of ammonia to give a buffer having a pH of 9.00 is 7.6 g.

What Mass of Ammonium Nitrate Must Be Added to 350