Should the pH of a buffer change when the buffer is diluted? Explain fully, using the Henderson-Hasselbalch equation as well as the results listed below:

1. 50 mL 0.10 M NH₃ + 50 mL 0.10 M NH₄NO₃ pH = 8.69
2. 5 mL 0.10 M NH₃ + 5 mL 0.10 M NH₄NO₃ + 6 mL H₂O pH = 8.69

The pH's listed above are experimental results.