Question

Q.Identify the ions in the salt based on the colour and solubility of the
precipitate in excess NaOH solution.

(i) Soluble chalky white precipitate
(ii) Gelatinous white green precipitate
(iii) Insoluble pale blue precipitate
​

Answer 1

Answer:

(i) Fe

3+

with NaOH gives reddish brown precipitate of Fe(OH)

3

.

(ii) Pb

+2

with NH

4

OH gives gelatinous white precipitate of Pb(OH)

2

.

(iii) Ca

+2

with NaOH gives white precipitate of Ca(OH)

2

which dissolves in excess.

Explanation:

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