Acids, bases and salts · Grade 10
Making a salt: copper sulfate
ChemAI · Worksheet
NameClassDate
Aim
Base + acid → salt + water, with copper(II) oxide.
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Add copper(II) oxide powder (2–3 portions, so it is in excess). | |
| 2 | Heat gently: the oxide dissolves in warm acid. | |
| 3 | Keep warming until the solution is clearly blue. Leftover black powder shows the oxide was in excess. |
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?