2010104
| Pregunta | Respuesta |
| 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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