Edexcel IAL Chemistry AS 8.19 Tests for carbonate, sulfate and ammonium ions
Edexcel IAL Chemistry AS 8.19 Tests for carbonate, sulfate and ammonium ions
Choose the reagent sequence first, state the precise gas or precipitate observation and include aqueous and solid states when an ionic equation is requested.
How this is tested
- Use acid and limewater to identify carbonate or hydrogencarbonate from carbon dioxide.
- Test sulfate with acidified barium solution and write the BaSO₄ precipitation equation.
- Warm ammonium ions with NaOH and confirm NH₃ using damp red litmus or HCl fumes.