CH-1577

Group 17 halogens

Chemistry · Secondary 4 · Medium · Group 17 halogens

1. $\text{Cl}_2 (aq) + 2\text{Br}^- (aq) \rightarrow 2\text{Cl}^- (aq) + \text{Br}_2 (aq);$ colourless solution turns orange‑brown
2. $\text{Br}_2 (aq) + 2\text{Cl}^- (aq) \rightarrow 2\text{Br}^- (aq) + \text{Cl}_2 (aq);$ orange‑brown solution becomes colourless
3. No reaction; colourless solution remains colourless
4. $\text{Cl}_2 (aq) + 2\text{Br}^- (aq) \rightarrow 2\text{Cl}^- (aq) + \text{Br}_2 (aq);$ colourless solution turns green

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