Water and solutions · Grade 10
Dilution and pH
ChemAI · Worksheet
NameClassDate
Aim
Each tenfold dilution of a strong acid raises the pH by 1.
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Turn on the pH meter. | |
| 2 | With 1 mL selected, pour from tube 1 into tube 2. | |
| 3 | Pour 1 mL from tube 2 into tube 3. Compare the pH values. | |
| 4 | Add universal indicator to all three tubes. |
Questions
- Write a word or symbol equation for one reaction you observed.
- Explain your most important observation using particles, ions or energy.
- Was your prediction right? What would you change to get a more reliable result?