DP Chemistry (first assessment 2025)

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Question 21N.2.HL.TZ0.8

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Date November 2021 Marks available [Maximum mark: 4] Reference code 21N.2.HL.TZ0.8
Level HL Paper 2 Time zone TZ0
Command term Annotate, Draw Question number 8 Adapted from N/A
8.
[Maximum mark: 4]
21N.2.HL.TZ0.8

The standard electrode potential of zinc can be measured using a standard hydrogen electrode (SHE).

Draw and annotate the diagram to show the complete apparatus required to measure the standard electrode potential of zinc.

[4]

Markscheme

H2 (g) entering at «298 K and» 100 kPa ✔

platinum electrode on left ✔

voltmeter connecting electrodes AND salt bridge connecting electrolytes ✔

1 mol dm–3 H+ on the left AND 1 mol dm–3 Zn2+ on the right ✔

 

Voltmeter and salt bridge need to be drawn but not necessarily annotated for M3.

Concentrations, but not state symbols, required for M4.

Syllabus sections