Advanced Analysis
After adding a small amount of acid to a tap water solution, the pH will be controlled by the molar concentration of the diluted acid:
0.001 ml x 10-4 mmoles/ 50.001 ml ~ 2 10-9 -> pH 8.7
- 0.011 ml x 10-4 mmoles/ 50.011 ml ~ 2 10-8 -> pH 7.7
- 0.111 ml x 10-4 mmoles/ 50.111 ml ~ 2 10-7 -> pH 6.7
- 1.111 ml x 10-4 mmoles/ 51.111 ml ~ 2 10-6 -> pH 5.7