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KUNCI JAWABAN
Pilihan Ganda
1. e 2. e
3. b 4. c
5. b 6. d
7. d 8. e
9. a 10. e
11. a 12. e
13. b 14. d
15. c 16. a
17. c 18. c
19. b 20. d
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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