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P. 51
KUNCI JAWABAN
Pilihan Ganda
1. e 14. d
2. e 15. c
3. b 16. a
4. c 17. c
5. b 18. c
6. d 19. b
7. d 20. d
8. e 21. c
9. a 22. b
10. e 23. a
11. a 24. b
12. e 25. d
13. b
Essay
1. Diketahui
Massa terlarut = 15 gram Mr = 60 Ditanya : Titik beku larutan?
P = 250 gram kf air = 1,86
Penyelesaian
°
∆ = ∙ ∆ = −
15 1000 1,86 = 0 −
∆ = ∙ ∙ 1,86
60 250
1 = −1,86℃
∆ = ∙ 4 ∙ 1,86
4
∆ = 1,86
2. Diketahui
Mr glukosa = 180 Mr urea = 60 Suhu urea = 27°C = 300°K
Volume glukosa = 800 mL Volume urea = 300 mL Ditanya : Titik beku larutan?
Massa glukosa = 5 gram Massa urea = 0,6 gram
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