1. What colours do calcium and copper metals create during a flame test?
- calcium = orange and copper = pruple
- calcium = red and copper = blue/green
- calcium = purple and copper = red
- calcium = blue/green and copper = red
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2. Name the exceptions to being insoluble
- potassium, sodium and ammonium carbonates and hydroxides
- chlorides, sulfates, nitrates and salts of sodium, potassium and ammonium
- nitrates, sulfates and salts
- lead, barium and calcium sulfates
3. What colours do potassium and sodium metals create during a flame test?
- potassium = purple and sodium = yellow/orange
- potassium = yellow and sodium = blue
- potassium = blue and sodium = red
- potassium = green and sodium = purple
4. What is the test for chlorides?
- Add dilute hydrochloric acid and barium chloride to the solution. If a white precipitate of barium chloride forms, the original was a chloride
- dd chlorine and water and if it begans to smoke and fizz it was a chloride
- Add dilute nitric acid and silver nitrate solution and if a white precipitate of silver chloride forms, the original was a chloride.
- Add citric acid and lead chloride solution and if it changes colour from clear to red it was a chloride
5. What is the test for carbonates?
- Add hydrochloric acid and barium chloride solution to the carbonate.
- Use a lighted splint to create a squeaky pop in a test tube if the hydrogen is present
- Bubble a gas through lime water and if carbon dioxide is present it will turn milky.
- Use a smouldering splint and see if it relights in the test tube if oxygen is present