Problem: How do you calculate the change in pH when 3.00 mL of 0.100 M   HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq) ?

FREE Expert Solution

We have to calculate the change in pH of a buffer made of NH3(aq) and NH4Cl(aq) when a small amount of HCl is added to the buffer.

The change in pH of the buffer can be calculated through these steps:

  1. Find the initial pH of the buffer using the Henderson-Hasselbalch equation.
  2. Find the changes in concentrations of the buffer components when HCl is added.
  3. Find the new pH of the buffer using the Henderson-Hasselbalch equation.
  4. Calculate the change in pH of the buffer.
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Problem Details

How do you calculate the change in pH when 3.00 mL of 0.100 M   HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq) ?