Problem: Consider a buffer solution that is 0.50 M in NH3 and 0.20 M in NH4Cl. For ammonia, pKb= 4.75. Calculate the pH of 1.0 L upon addition of 0.110 mol of solid NaOH to the original buffer solution.

FREE Expert Solution

Step 1

1.0 L ×0.50 mol NH31 L= 0.50 mol NH3

1.0 L ×0.20 mol NH4Cl1 L= 0.20 mol NH4Cl


Step 2

mol NH4+ = 0.20 mol - 0.110 mol = 0.09 mol

mol NH3 = 0.50 mol + 0.110 mol = 0.61 mol


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Problem Details
Consider a buffer solution that is 0.50 M in NH3 and 0.20 M in NH4Cl. For ammonia, pKb= 4.75. Calculate the pH of 1.0 L upon addition of 0.110 mol of solid NaOH to the original buffer solution.
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