ICSE Class 10 Chemistry 2023 Solved Paper

SECTION - II

Identify the cation in each of the following cases:

Question : 34

Total: 88

Sodium hydroxide solution when added to Solution C gives a white precipitate which is insoluble in excess of sodium hydroxide solution.

Solution:

When NaOH is added to solution(C) calcium nitrate, double displacement reaction takes place, a white ppt. of calcium hydroxide is formed which is insoluble in excess of NH4‌OH solution.
‌2‌NaOH(aq)+Ca(NO3)2(aq)→ ‌

Ca(OH)2

White‌ppt

+2NaNO3(aq)
The cation is Ca2+.

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