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State a test and the positive observation that identifies the contents of each bottle. Chemical equations are not needed.
Chemistry 5070 · O Level · Identification of ions and gases
Identification of ions and gases — practice question
The student is given three bottles: dilute hydrochloric acid, aqueous sodium sulfate and ethanol.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Magnesium + hydrochloric acid: bubbles / effervescence / hydrogen gas formed” …
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