Which of the following pairs of cations can be separated by adding NH4Cl, NH4OH and then (NH4)2CO3 t — Qualitative and Quantitative Analysis Chemistry Question
Question
Which of the following pairs of cations can be separated by adding NH4Cl, NH4OH and then (NH4)2CO3 to the mixture?
Answer: A
💡 Solution & Explanation
Ca2+ precipitates as CaCO3 (Group V), while Mg2+ remains in solution because NH4Cl suppresses the CO3^2- concentration below the level needed to precipitate MgCO3.
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