Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What are the different colours produced by some metal ions (cations)?
   • lithium compounds result in a crimson flame ? sodium compounds result in a yellow flame ? potassium compounds result in a lilac flame ? calcium compounds result in an orange-red flame ? copper compounds result in a green flame.
2. When are some flame colours masked?
   • If a sample containing a mixture of ions
3. How do carbonates react with dilute acids?
   • Carbonates react with dilute acids to form carbon dioxide gas. Carbon dioxide can be identified with limewater.
4. What do Halide ions produce when they react with silver nitrate solution?
   • Halide ions in solution produce precipitates with silver nitrate solution in the presence of dilute nitric acid. Silver chloride is white, silver bromide is cream and silver iodide is yellow.