DifferenceModerate1 mark
5(a)
Distinguish between the following pairs of compounds using a reagent as a chemical test:
Calcium nitrate and Zinc nitrate solution.
Topic: Qualitative analysis using NaOH and NH₄OH
Previous-year question practice database
Answer
Exam answer
Add excess NaOH: Zn²⁺ gives a white precipitate soluble in excess; Ca²⁺ gives a white precipitate insoluble in excess.
Comparison
| Calcium nitrate | Zinc nitrate |
|---|---|
| White precipitate insoluble in excess NaOH. | White precipitate soluble in excess NaOH. |
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