Kimyoviy bog‘lanish

98-9son-57.
9. Natriy nitratning 20⁰C dagi to‘yingan eritmasidagi tuzning massa ulushi 85% bo‘ladi. Shu temperaturada 200 g suvda qanday massadagi tuzni eritish mumkin?
A) 150 B) 459 C) 567 D) 1015 E) 1133
00-5son-45.
10. Kumush nitratning 20⁰C dagi eruvchanligi 228 g, 80⁰C dagisi esa 635 g bo‘lsa, 80⁰C dagi 100 g to‘yingan eritmasini 20⁰C gacha sovutilganda, kristall holda ajraladigan tuzning massasi (g) ni hisoblang.
A) 86,4 B) 69,5 C) 55,4 D) 41,3 E) 24,3
00-5son-46.
11. Konsentratsiyasi 72% bo‘lgan kaliy atsetat eritmasining 450 g miqdori 40 dan 0⁰C gacha sovutilganda 162 g kristallogidrat cho‘kkan. Kaliy atsetatning 0⁰C dagi 100 g suvda eruvchanligi 216,7 g bo‘lsa, olingan kristallgidrat formulasini toping.
A) CH₃COOK•H₂O B) CH₃COOK•2H₂O
C) CH₃COOK•3H₂O D) 3CH₃COOK•2H₂O
E) 2CH₃COOK•3H₂O
00-8son-52.
12. Ammoniy xromatning to‘yingan eritmasida 70⁰C da tuz massa ulushi 40,3%, 20⁰C esa-24,8% ni tashkil etadi. 70⁰C da tayyorlangan 500 g to‘yingan eritma 20⁰C gacha sovutilgandan keyin cho‘kmaga tushadigan tuz massasi (g) ni hisoblang.
A) 105 B) 107 C) 103 D) 111 E) 101
00-8son-53.
13. Ammoniy xloridning 15⁰C dagi eruvchanlik koeffitsienti 35 ga teng. Shu temperaturada to‘yingan eritmadagi tuzning massa ulushini aniqlang.
A) 0,26 B) 0,20 C) 0,35 D) 0,38 E) 0,215
00-9son-33.
14. Tuzning 20⁰C dagi eruvchanlik koeffitsienti 25 ga teng bo‘lsa, 100 g to‘yingan eritmada shu tuzdan necha gramm bo‘ladi?
A) 40 B) 45 C) 35 D) 30 E) 20
00-9son-35.
15. 80⁰C da 300 g to‘yingan natriy nitrat eritmasi 20⁰C gacha sovutilganda cho‘kmaga tushgan tuzning massasini (g) va eritmada qolgan tuzning massa ulushini % hisobida toping. S(20⁰C)=88, S(80⁰C)=148
A) 96,8: 35,5% B) 96,8: 46,8% C) 72,6: 46,8%
D) 142: 35,5% E) 238,7: 46,8%