What will be the colour of the precipitate formed when ferrous sulphate is added to an aqueous solution of sodium hydroxide?

[1 mark]

Dirty green

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Reddish brown

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Pale blue

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White

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Solution

The correct option is A Dirty green
When an aqueous solution of ferrous sulphate $(F e S O_{4})$ reacts with an aqueous solution of sodium hydroxide (NaOH), a dirty green precipitate of ferrous hydroxide $(F e {(O H)}_{2})$ is formed.

The following reaction takes place:
$F e S O_{4} (a q) + 2 N a O H (a q) \to N a_{2} S O_{4} (a q) + F e {(O H)}_{2} (s)$ ${F e (O H)}_{2}$ forms the dirty green ppt.

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What will be the colour of the precipitate formed when ferrous sulphate is added to an aqueous solution of sodium hydroxide? [1 mark]

What will be the colour of the precipitate formed when ferrous sulphate is added to an aqueous solution of sodium hydroxide?

[1 mark]