DP Chemistry (last assessment 2024)

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Question 18M.3.hl.TZ1.14a.i

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Date May 2018 Marks available [Maximum mark: 3] Reference code 18M.3.hl.TZ1.14a.i
Level hl Paper 3 Time zone TZ1
Command term Deduce, Identify Question number a.i Adapted from N/A
a.i.
[Maximum mark: 3]
18M.3.hl.TZ1.14a.i

Modern electric cars store their energy in lithium ion batteries.

The diagram represents a cell in such a battery delivering a current.

(a.i)

Complete the half-equations on the diagram and identify the species moving between the electrodes.

M18/4/CHEMI/HP3/ENG/TZ1/14.a.i

[3]

Markscheme

 

Accept any balanced equation which shows Li oxidized to Li+ for M3, such as

LiC6 → Li+ + C6 + e–     or

LixC6 → xLi+ + 6C + xe–

[3 marks]

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