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AQA Ion tests
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Question | Answer |
---|---|
What metal ion forms a crimson flame during a flame test? | Lithium |
Sodium hydroxide is added to a substance, forming a blue precipitate. What metal ion does the substance contain? | Copper(II) |
A dilute acid is mixed with a carbonate. What is the resulting chemical and how does it react when mixed with limewater? | Carbon dioxide - turns it cloudy |
Sodium hydroxide is added to a substance, forming a green precipitate. What metal ion does the substance contain? | Iron(II) |
What metal forms a Yellow flame during a flame test? | Sodium |
A solution containing halide ions reacts with a silver nitrate solution in the presence of dilute nitric acid. A white precipitate is formed, What was the halide ion? | Chloride |
What metal forms a lilac flame during a flame test? | potassium |
A solution containing halide ions reacts with a silver nitrate solution in the presence of dilute nitric acid. A cream precipitate is formed, What was the halide ion? | bromide |
Sodium hydroxide is added to a substance, forming a brown precipitate. What metal ion does the substance contain? | (Iron)(III) |
What metal forms a red flame during a flame test? | calcium |
Sodium hydroxide is mixed with a solution and forms a white precipitate. What three metal ions could it contain? | Aluminium, magnesium, calcium |
A solution containing halide ions reacts with a silver nitrate solution in the presence of dilute nitric acid. A yellow precipitate is formed, What was the halide ion? | Iodide |
What metal forms a green flame during a flame test? | Barium |
An ion in solution produces a white precipitate when reacted with barium chloride solution in the presence of dilute hydrochloric acid. What is the ion? | Sulfate |