DP Chemistry (last assessment 2024)

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Question 17N.1.sl.TZ0.2

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.1.sl.TZ0.2
Level sl Paper 1 Time zone TZ0
Command term Question number 2 Adapted from N/A
2.
[Maximum mark: 1]
17N.1.sl.TZ0.2

What is the value of x when 32.2 g of Na2SO4•xH2O are heated leaving 14.2 g of anhydrous Na2SO4? Mr(H2O) = 18; Mr(Na2SO4) = 142.

Na2SO4•xH2O (s) → Na2SO4 (s) + xH2O (g)

A. 0.1

B. 1

C. 5

D. 10

[1]

Markscheme

D

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