Precipitation reactions

Question	Answer
State the colour change that occurs when Cobalt 2+ ions react with aqueous Sodium Hydroxide ions	Pink solution forms a blue precipitate
State the colour change that occurs when Iron 2+ ions react with aqueous Sodium Hydroxide ions	Pale green solution forms a green precipitate
State the colour change that occurs when Iron 3+ ions react with aqueous Sodium Hydroxide ions	Pale yellow solutions forms a rusty brown precipitate
State the colour change that occurs when Copper 2+ ions react with aqueous Sodium Hydroxide ions	Pale blue solution forms a pale blue precipitate
What happens to the precipitate involving Cobalt and hydroxide ions when in the presence of air	Blue precipitate turns beige
What happens to the precipitate involving Iron 2+ and hydroxide ions when in the presence of air	At its surface the green precipitate turns rusty brown

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	Created by mayy about 9 years ago