Question 1
Paper 2Medium6 marksA student investigates displacement reactions between halogens and halide ions in aqueous solution. The results are shown below. Chlorine, bromine and iodine occur in this order from top to bottom in Group 17.
| Halogen added | Halide ions present | Result |
|---|---|---|
| Cl₂(aq) | Br⁻(aq) | Reaction |
| Br₂(aq) | I⁻(aq) | Reaction |
| I₂(aq) | Br⁻(aq) | No reaction |
(a)[2]
Write the balanced ionic equation for the reaction between Br₂(aq) and I⁻(aq).
(b)[1]
Using your equation in (a), identify the species oxidized.
(c)[3]
A student predicts that I₂(aq) reacts with Cl⁻(aq). Predict whether this reaction occurs. Use the results and the positions of the elements in Group 17 to justify your answer.