A mixture of ferric alum, chrome alum and potash alum is dissolved in water and treated with an exce — Qualitative and Quantitative Analysis Chemistry Question
Question
A mixture of ferric alum, chrome alum and potash alum is dissolved in water and treated with an excess of NH3 solution and warmed with a mixture of NaOH and H2O2 and filtered. We will get:
Answer: B
💡 Solution & Explanation
Fe3+ forms Fe(OH)3 (brown residue). Cr3+ forms CrO4^2- (yellow filtrate). Al3+ forms soluble AlO2^-.
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