Kimyoviy bog‘lanish

03-5son-45.
46. Agar 100⁰C da 100 g suvda 155 g, 0⁰C da esa 111 g potash erib, to‘yingan eritma hosil qilsa, uning 770 g eritmasi 100⁰C dan 0⁰C gacha sovutilganda, cho‘kmaga tushadigan tuzning massasini (g) hisoblang.
A) 44,0 B) 55,6 C) 77,0 D) 132,9 E) 140,5
03-5son-46.
47. Tuzning to‘yingan eritma 90⁰C dan 25⁰C gacha sovitilganda, 200 g tuz kristallandi. Agar 90⁰C va 25⁰C da tuzning eruvchanligi 42,7 va 6,9 grammni tashkil etsa, boshlang‘ich eritmada suv va tuz qancha massadan (g) olinishi kerak?
A) 558,7: 238,5 B) 597,2: 238,5 C) 478,1: 192,4
D) 180,6: 49,6 E) 150,3: 42,7
03-5son-47.
48. Marganets sulfatning 25⁰C li suvda eruvchanligi eritma massasiga nisbatan 39,3% ga teng. Xuddi shunday haroratli 250 g suvda qancha miqdor (g) marganets(II) sulfat erishi mumkin?
A) 41,6 B) 21,6 C) 31,6 D) 51,5 E) 161,86
03-10son-20.
49. Mis(II) nitratning 60⁰C li suvda eruvchanligi 64,2% ga teng. To‘yingan eritma hosil qilish uchun 500 g mis(II) nitratni 60⁰C li eritmaning qancha miqdorida (g) eritish kerak?
A) 755,5 B) 888,8 C) 778,8 D) 998,8 E) 889,9
03-10son-21.
50. 24⁰C da natriy nitratning molyar eruvchanligi 8,76 mol/l ga (ρ=1,2 g/ml) teng. Shu moddaning 100 g suvga nisbatan eruvchanligi (%) toping.
A) 21 B) 31 C) 41 D) 62 E) 35
03-10son-24.
51. Kaliy nitratning 40⁰C dagi eruvchanlik koeffitsienti 61 ga teng bo‘lsa, uning 500 g to‘yingan eritmasini bug‘latish natijasida olingan tuzning qattiq qizdirilishi natijasida ajralib chiqqan gazning hajmini (l, n.sh.) toping.
A) 21 B) 22,4 C) 31 D) 189,4 E) 33,6
03-10son-39.
52. Kaliy nitratning 40⁰C dagi eruvchanlik koeffitsienti 61 ga teng. Uning 500 g to‘yingan eritmasidagi suvning massasini (g) toping.
A) 189,5 B) 315,5 C) 310,5 D) 410,5 E) 250,5
03-10son-40.
53. 200 ml 63% li kaliy nitrat eritmasi (ρ=1,35 g/ml) 80⁰C dan 25⁰C gacha sovutilganda 120 g tuz cho‘kmaga tushdi. Eritmada qolgan tuzning foiz konsentratsiyasini aniqlang.
A) 33,4 B) 23,4 C) 13,4 D) 7,4 E) 3,4
97-7son-14.
54. 20% li 200 ml (ρ=1,19 g/ml) KOH eritmasiga 16% li 200 ml (ρ=1,11 g/ml) H₂SO₄ kislota eritmasi qo‘shildi. Eritma 10⁰C gacha sovutilganda, 28 g cho‘kma tushdi. 10⁰C da eritmadagi tuzning massa ulushini (%) aniqlang.
A) 3,2 B) 5,4 C) 8,1 D) 12,5 E) 15,3