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For each of the three unlabelled bottles, describe a test and state the observations needed to identify the contents of the bottle. Make it clear which solution each positive result identifies. Chemical equations are not required.
Chemistry 5070 · O Level · Identification of ions and gases
Identification of ions and gases — practice question
The student is given three unlabelled bottles containing dilute sulfuric acid, aqueous calcium chloride and aqueous zinc chloride. In addition, the student has dilute nitric acid, aqueous barium nitrate and aqueous sodium hydroxide, with no other chemicals or indicators supplied.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Use aqueous barium nitrate (+ dilute nitric acid) as the test for dilute sulfuric acid” …
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