Chemistry - Salt Analysis Question with Solution | TestHub
A metallic chloride, denoted as (A) reacts with NaOH in the presence of to yield a yellow - coloured solution containing salt (B) On adding dilute , the solution turns orange due to the formation of compound (C).
When compound (D) is heated with (C) in the presence of concentrated , a red, volatile (E) is generated.
The compound (E), upon absorption in NaOH, regenerates a yellow solution of (B) salt, which produces a yellow precipitate on treatment with acidified lead acetate solution.
Compound (C), when reacted with , gives compound F, which on heating decomposes into a green solid (G), water, and a colourless gas. Moreover, compound (D) imparts a golden-yellow flame colour.
Identify the compounds (A) through (G) and Calculate total number atoms per formula unit of A,B,C,D,E,F,G
Answer:
Solution:
Identifications
(chromium (III) chloride) | 4 |
|---|---|
(chromate ion; yellow in basic medium) | 7 |
(dichromate ion ; orange in acidic medium) | 11 |
(sodium chloride - gives golden-yellow flame) | 2 |
(chromyl chloride, red, volatile liquid) | 5 |
(ammonium dichromate) | 19 |
(chromium (III) oxide ; green residue) | 5 |
| 53 |
