Identifying substances · Grade 10
Testing for ammonium ions
ChemAI · Worksheet
NameClassDate
Aim
Warm with sodium hydroxide and test the gas.
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Add sodium hydroxide. | |
| 2 | Warm the tube gently in the water bath (Apparatus → Water bath). | |
| 3 | Hold damp red litmus paper at the mouth of the tube. |
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?