DP Chemistry (last assessment 2024)

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Question 20N.2.sl.TZ0.1b(i)

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.2.sl.TZ0.1b(i)
Level sl Paper 2 Time zone TZ0
Command term Calculate Question number b(i) Adapted from N/A
b(i).
[Maximum mark: 1]
20N.2.sl.TZ0.1b(i)

Chlorine undergoes many reactions.

2.67 g of manganese(IV) oxide was added to 200.0 cm3 of 2.00 mol dm-3 HCl.

MnO2 (s)+4HCl (aq)→Cl2 (g)+2H2O (l)+MnCl2 (aq)

(b(i))

Calculate the amount, in mol, of manganese(IV) oxide added.

[1]

Markscheme

«2.67 g86.94 g mol-1=» 0.0307 «mol» ✔

Examiners report

Most candidates were able to determine the number of moles of MnO2 using the mass.

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