DP Chemistry (last assessment 2024)

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Question 18M.2.hl.TZ2.4a

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.2.hl.TZ2.4a
Level hl Paper 2 Time zone TZ2
Command term Formulate Question number a Adapted from N/A
a.
[Maximum mark: 1]
18M.2.hl.TZ2.4a
(a)

In acidic solution, bromate ions, BrO3−(aq), oxidize iodide ions, I−(aq).

BrO3−(aq) + 6H+(aq) + 6e− ⇌ Br−(aq) + 3H2O(l)

2I−(aq) ⇌ I2(s) + 2e−

Formulate the equation for the redox reaction.

[1]

Markscheme

BrO3–(aq) + 6H+(aq) + 6I–(aq) ⇌ Br–(aq) + 3I2(s) + 3H2O(l)

 

Accept → for ⇌ .

[1 mark]

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