| Date | November 2017 | Marks available | 1 | Reference code | 17N.1.sl.TZ0.2 |
| Level | SL | Paper | 1 | Time zone | TZ0 |
| Command term | Question number | 2 | Adapted from | N/A |
Question
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
Markscheme
D
Examiners report
[N/A]
Syllabus sections
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