An aqueous solution of `FeSO_(4),Al_(2)(SO_(4))_(3)` and chrome alum is heated with excess of `Na_(2)O_(3)` and filtered. The material obtained are `:

Question

An aqueous solution of `FeSO_(4),Al_(2)(SO_(4))_(3)` and chrome alum is heated with excess of `Na_(2)O_(3)` and filtered. The material obtained are `:

An aqueous solution of `FeSO_(4),Al_(2)(SO_(4))_(3)` and chrome alum is heated with excess of `Na_(2)O_(3)` and filtered. The material obtained are `:`
A. a colourless filtrate and a green residue
B. a yellow filtrate and a green residue
C. a yellow filtrate and a brown residue
D. a green filtrate and a brown residue

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
(c ) TIPS`//` FORMULAE`:` Chrome alum is `K_(2)SO_(4).Cr_(2)(SO_(4))_(3).24H_(2)O`. The filtrate is yellow due to `CrO_(4)^(2-)` ion and residue is brown due to `Fe(OH)_(3)`.

4 views Answered 2023-02-05 15:29