A) 44,0
B) 55,6
C) 77,0
D) 132,9
E) 140,5
18. (03-9-16) Eruvchanligi eng kam bolgan kumush tuzini korsating.
A) AgCI B) AgBr
C)Agl D)Ag2Cr04
E)Ag2S
19. (03-10-20) Marganes sulfatning 25°C li suvda eruvchanligi eritma massasiga nisbatan 39,3% ga teng. Xuddi shunday haroratli 250 g suvda qancha miqdor (g) marganes(ll) sulfat erishi mumkin?
A) 41,6 В) 21,6
С) 31,6 D) 51,5
E) 61,5
20. (03-10-21) Mis(H) nitratning 60°C li suvda eruvchanligi 64,2 ga teng. Toyingan eritma hosil qilish uchun 500 g mis(ll) nitratni 60°C li suvning qancha miqdorida (g) eritish kerak? A) 755,5 B) 888,8 C) 778,8 D) 998,8
E) 889,9
21. (03-10-23) 24°C da natriy nitratning molyar eruvchanligi 8,76 mol/l ga
(p = 1,2 g/ml) teng. Shu moddaning 100 g suvga nisbatan eruvchanligini (%) toping.
A) 21 B)31 C) 41 D) 62
E) 35
22. (04-1-335) Kaliy dixromatning 78°C dagi toyingan 400 g eritmasi 18°C gacha sovutilganda, qancha massa kaliy dixromat chokmaga tushadi? [S(18°C) = 10,
S(78°C) = 40]
A) 85,7 B) 116,8 C)360 D) 107
E) 140
23. (04-1-484) Kaliy nitratning 40°C dagi eruvchanlik koeffitsiyenti 61 ga teng bolsa, uning 500 g toyingan eritmasini buglanish natijasida olingan tuzning qattiq qizdirilishi natijasida hosil bolgan qattiq qoldiqning massasini toping.
A) 21 B) 22,4 C)31 D) 189,4
E) 159,4
24. (04-1-485) Kaliy nitratning 40°C dagi eruvchanlik koeffitsiyentni 61 ga teng. Uning 500 g toyingan eritmasidagi suvning miqdorini (mol) toping.
A) 189,5 B) 315,5 C) 310,5 D) 410,5 E) 17,25
25. (04-1-694) Tuzlarning eruvchanligi
quyidagi qatorda qanday ozgaradi? Са(Н2Р04)2 Са3(Р04)2 CaHP04
A) ozgarmaydi
B) kamayadi
C) ortadi
D) oldin kamayadi, songra ortadi
E) oldin ortadi, keyin kamayadi
26. (v4-124-34) Magniy sulfatning 80°C da toyingan eritmasidan 972 g miqdorini
20°C gacha sovutilganda, kristall holida ajralib chiqadigan MgS04 chokmasining massasini hisoblang. [S20° = 44,5 g va S8o° = 64,2 g]
A) 210 B) 116,6 C) 229 D) 222
E) 187
27. (v5-119-29) 24,9 ml suvda 6,72 I (n. sh.) ammiak eritildi. Olingan eritmadagi ammiakning massa ulushini (%) hisoblang.
A) 30 B)13 C) 17 D) 34
E) 51
28. (v5-127-24) Moddaning 15°C da tayyorlangan 48 g toyingan eritmasidagi suv buglatilgandan song 28 g tuz ajralib qoldi. Uning eruvchanlik koffitsiyentini toping.
A) 58,33 B) 120 C) 71,42 D) 240
E) 140
29. (v6-122-34) Glauber tuzining 90°C li 200 g toyingan eritmasi 0°C gacha sovitilganda hosil bo!gan eritmaning konsentratsiyasini (%) hisoblang. Glauber tuzining 90°C da eruvchanligi 30 ga, 0°C da esa 4,5 ga teng.
A) 1,9 B) 4,3 C) 6,1 D) 2,3
30. (v6-128-34) 32,5 g ammoniy xloridning 100°C dagi toyingan eritmasini 0°C gacha sovutilganda hosil bolgan eritmadagi xlor ionini tola choktirish uchun necha litr (0,2 mol/l) kumush nitrat eritmasi kerak boladi? (S(100°C) = 78,6; S(0°C) = 29,4)
A). 0,5 B)1,3
C)1,6 D) 0,8
31. (v6-133-34) 86 g mis kuporosi (100°C) 200 g suvda tola eritildi. Ushbu eritma 0°C gacha sovitilganda hosil bolgan eritmaning konsentratsiyasini (%) hisoblang. Mis kuporosining 100°C dagi eruvchanligi 43 ga, 0°C da esa 13 ga eng.
A) 3,73 B) 11,5
0)13,2 D) 7,36
32. (v7-105-24) 30 g glauber tuzi 90°C li 100 g suvda tola eritildi. Ushbu eritmaning 15°C gacha sovutilgandagi konsentratsiyasini (%) hisoblang. Glauber tuzining 90°C da eruvchanligi 30 ga, 15°C da esa 12 ga teng.
A) 10,7 B) 4,3
C) 4,7 D) 1,9
33. (v9-101-10) Kumush nitratning 80°C dagi toyingan eritmasi 30°C gacha sovutilganda 60 g chokma tushgan bolsa, ushbu toyingan (80°C da) eritmani tayyorlash uchun zarur bolgan kumush nitrat va suvning massasini (g) hisoblang. [S(30°C) = 220; S(80°C) = 520]
A) 104; 20 B) 100; 24
C) 52; 10 D) 95; 29
34. (v9-102-14) Natriy sulfatning toyingan (120°C da) eritmasi 25°C gacha sovutilganda 200 g tuz chokmaga tushgan bolsa, ushbu toyingan (120°C da) eritmaning va uning tarkibidagi natriy sulfat massalarini (g) hisoblang. [S(25°C) = 10; S(120°C) = 50].
A) 750; 250 B) 500; 167
C) 450; 150 D) 600; 200
35. (v9-104-3) Kaliy karbonatning 40°C dagi eruvchanligi 130 ga teng bolsa, ushbu eritmaning (p = 1,62 g/ml) molyar konsentratsiyasini (mol/l) hisoblang.
A) 4,6 B)6,6 C) 3,4 D) 8,2
36. (v9-105-2) 100 g suvda 80°C da 520 g, 30°C da esa 220 g kumush nitrat eridi. Kumush nitratning 80°C dagi 1240 g toyingan eritmasi 30°C gacha sovutilganda chokmaga tushadigan kumush nitratning massasini (g) hisoblang.
A)450 B)600 C)256 D) 300
37. (v9-106-21) 100 g suvda 110°C da 160 g 0°C da esa 110 g kaliy karbonat eridi. Kaliy karbonatning 390 g toyingan (110°C da) eritmasi 0°C gacha sovutilganda chokmaga tushadigan kaliy karbonatning massasini (g) hisoblang.
A)56 B)75 C)49 D)84
38. (v9-108-28) Kaliy bromidning 90°C dagi toyingan eritmasi 30°C gacha sovutilganda, 120 g tuz chokmaga tushgan bolsa, ushbu toyingan eritmani (90°C da) tayyorlash uchun zarur bolgan kaliy bromide va suvning massasini (g) aniqlang. [S(30°C) = 70; S(90°C) = 100]
A) 450; 350 B) 400; 400
C) 380; 630 D) 555; 245
39. (v9-109-9) 100 g suvda 110°C da 160 g, 0°C da esa 110 g kaliy karbonat eridi. Kaliy karbonatning 1040 g toyingan (110°C da) eritmasi 0°C gacha sovutilganda chokmaga tushadigan kaliy karbonatning massasini (g) hisoblang.
A)160 B)250 C)200 D) 150
40. (v9-111-22) Tarkibida 400 g suv bolgan ammoniy xloridning toyingan (100°C dagi) eritmasi 0°C gacha sovutilganda necha gramm chokma tushadi? [S(0°C) = 40; S(100°C) = 80].
A)160 B)360 G)80 D) 40
41. (v9-114-10) Tarkibida 200 g suv bolgan ammoniy xloridning 100°C dagi toyingan eritmasini 0°C gacha sovutilganda necha gramm tuz chokmaga tushadi? [S(0°C) = 40; S(100°C) = 80].
A)360 B)160 C)80 D) 40
42. (v9-115-23) Natriy nitratning 80°C dagi 750 g toyingan eritmasini 20°C gacha sovutilganda chokmaga tushgan tuzning massasi (g) va eritmadagi qolgan tuzning massa ulushini (%) hisoblang. [S(20°C) = 90; S(80°C) = 150].
A) 180; 29,5 B) 294; 47,3
C) 180; 47,3 D) 270; 34,6
43. (v9-116-26) Kaliy bromidning 80°C dagi toyingan eritmasi 20°C gacha sovutilganda,
45 g chokma tushgan bolsa, ushbu toyingan eritmani (80°C da) tayyorlash uchun zarur bolgan kaliy bromid va suvning massasini (g) hisoblang. [S(20°C) = 60; S(80°C) = 90]
A) 85; 200 B) 120; 165
C) 135; 150 D) 90; 195
44. (v9-118-22) Kaliy karbonatning 30°C dagi eruvchanligi 120 ga teng bolsa, ushbu eritmaning (p = 1,6 g/ml) molyar konsentratsiyasini (mol/l) hisoblang.
A) 4,6 B)6,3 C) 3,4 D) 12
45. (v9-119-34) Ammoniy xloridning
100°C dagi toyingan eritmasi tarkibida 400 g suv mavjud. Ushbu eritma 0°C gacha sovutilganda, necha gramm tuz chokmaga tushadi? [S(0°C) = 40; S(100°C) = 80]
A)80 B)160 C)40 D)360
46. (v9-120-10) Kumush nitratning 70°C dagi toyingan eritmasi 20°C gacha sovutilganda 30 g tuz chokmaga tushgan bolsa, ushbu toyingan eritmani (70°C da) tayyorlash uchun zarur bolgan kumush nitrat va suvning massasini (g) hisoblang. [S(20°C) = 200; S(70°C) = 500]
A) 40; 20 B) 55; 5
C) 45; 15 D) 50; 10
47. (v9-123-12) Natriy nitratning 1520 g toyingan (70°C dagi) eritmasi 15°C gacha sovutilganda chokmaga tushgan tuzning massasi (g) va eritmada qolgan tuzning massa ulushini (%) hisoblang. [S(15°C) = 80; S(70°C) = 140].
A) 360; 44 B) 380; 44
C) 180; 47,3 D) 294; 34
48. (v9-124-8) Kaliy dixromatning 80°C dagi 290 g toyingan eritmasi 20°C gacha sovutilganda chokmaga tushgan tuzning massasini (g) hisoblang.
[S(20°C) = 12; S(80°C) = 45]
A) 80 B) 24 C) 45 D) 66
49. (v9-125-29) Natriy nitratning 1440 g toymgan (70°C dagi) eritmasi 15°C gacha sovutilganda chokmaga tushadigan tuzning massasi (g) va eritmada qolgan tuzning massa ulushini (%) hisoblang. [S(15°C) = 80; S(70°C) = 140].
A) 380; 80 B) 294; 44
C) 360; 44 D) 180; 47,3
50. (v12c-210-13) 0°C da osh tuzining eruvchanligini (g) aniqiang.
A) 25 B) 58,5 C) 36,5 D) 35,6
51. (v12c-219-4) 200 ml 63% li kaliy nitrat eritmasi (p = 1,35 g/ml) 80°C dan
25°C gacha sovutildi. Bunda 120 g tuz chokmaga tushdi. Eritmada qolgan tuzning massa ulushini (%) hisoblang.
A) 44,4 B) 33,4 C) 40,4 D)28,4
52. (v12c-223-27) 20°C dagi 126,4 g Fe2(S04)3 ning toyingan eritmasida 361,2-1022 ta kislorod atomi bolsa, Fe2(S04)3 ning 20°C dagi eruvchanligini hisoblang.
A) 31,65 B)10,0
C) 46,3 D) 37,97
53. (v15-106-8) Tuzning 10°C va 18°C dagi eruvchanlik koeffitsiyentlari 20 va 30 ga teng. 10°C li suvga 14 g tuz eritilib toyingan eritma olindi. Eritma temperaturasi 18°C gacha oshirildi va eritmada tuz eritilib toyintirildi. Olingan eritma 4°C gacha sovitilganda
15,4 g tuz chokmaga tushdi. Tuzning 4°C dagi eruvchanlik koeffitsiyentini aniqiang.
A) 8 B) 4 C) 12 D) 24
54. (v15-108-21) 60°C temperaturadagi 280 g toyingan eritma 20°C gacha sovutilganda hosil bolgan chokmaning massasini (g) aniqiang. (S(20°C)tuz = 20 g, S(60°C)tuz = 50 g)
A)30 B)56 C)27 D)48
55. (v15-110-10) Nomalum tuzning xona haroratida eruvchanligi 30,5 g ga teng. 100 g eritmasi 0°C gacha sovutilganda 15,3 g chokma tushsa, uning 0°C dagi eruvchanligini aniqiang.
A) 9,5 B) 12,5 C) 10,5 D)11,5
56. (v15-126-27) Tuzning 10°C va 25°C dagi eruvchanlik koeffitsiyentlari 25 va 60 ga teng. 10°C li suvga 50 g tuz eritilib toyingan eritma olindi. Eritma temperaturasi 25°C gacha oshirildi va eritmada tuz eritilib toyintirildi. Olingan eritma 4°C gacha sovitilganda 96 g tuz chokmaga tushdi. Tuzning 4°C dagi eruvchanlik koeffitsiyentini aniqiang.
A) 12 B)18 C)24 D) 32
57. (v16-109-22_20°C da eritmada erigan tuz massasi erituvchi massasidan 2,5 marta kam bolsa, shu haroratdagi tuzning eruvchanligi va eritmaning massa ulushini (%) hisoblang.
A) 40; 28,6 B)20;10
C)20; 15 D) 40; 30
58. (v16-111-24) Tuzning 20°C va 30°C dagi eruvchanlik koeffitsiyentlari 35 va 40 ga teng. 20°C li suvga 28 g tuz eritilib toyingan eritma olindi. Eritma temperaturasi 30°C gacha oshirildi va eritmada tuz eritilib toyintirildi. Olingan eritma 15°C gacha sovutilganda 8 g tuz chokmaga tushdi. Tuzning 15°C dagi eruvchanlik koeffitsiyentini aniqiang.
A)30 B)12 C)18 D) 24
59. (v16-115-1_273 К temperaturada HBr ning eruvchanligi 171 g bolsa, shu temperaturadagi 300 ml suvda qancha (I, n. sh.) gaz eriydi?
A) 140,2 B) 139,450) 141,87D) 138,8
60. (v16-118-28_Tuzning 20°C va 35°C dagi eruvchanlik koeffitsiyentlari 15 va 40 ga teng. 20°C li suvga 13,5 g tuz eritilib toyingan eritma olindi. Eritma temperaturasi 35°C gacha oshirildi va eritmada tuz eritilib toyintirildi. Olingan eritma 15°C gacha sovitilganda 27 g tuz chokmaga tushdi. Tuzning 15°C dagi eruvchanlik koeffitsiyentini aniqiang.
A) 4 B) 12 C)10 D) 8
61. (v16-122-12_20°C da osh tuzining toyingan eritmasida erituvchi va erigan modda massa ulushi nisbati 2,74:1 bolsa, shu haroratda tuzning eruvchanligini aniqiang.
A) 36,5 B) 35,6 C) 20,5 D) 58,5
62. (v16-127-29_40°C dagi CuS04 ning toyingan eritmasiga 0uSO4 qoshib qizdirilganda 240 g 50% li eritma hosil boldi. Eritma boshlangich sharoitga keltirilganda 100 g CuS04-5H20 tarkibli kristallogidrat chokmaga tushdi. Dastlabki eritma tarkibidagi tuz massasini (g) aniqiang.
A)80 B)40 C)56 D)120
63. (v16-129-7_80°C da Ba(N03)2 ning 300 g toyingan eritmasi 50°C gacha sovutilganda Ba(N03)2H20 kristallogidrat chokmaga tushdi. Natijada necha gramm eritma qoldi? (Setrc = 40; S6o°c = 50)
A) 278 B) 233,3 C) 220,55 D) 228,57
64. (v17-103-1) X g 40% li CaBr2 eritmasini
toyintirish uchun 20 g CaBr2 tuzidan qoshish kerak. Tuzning ushbu haroratda eruvchanlik koeffitsiyenti 80 ga teng. Boshlangich eritmadagi CaBr2 ning miqdorrini (mol) toping. A) 0,2 B) 0,5 C) 0,4 D) 0,3
65. (v17-118-15) 20°C da osh tuzining toyingan eritmasida erituvchi va erigan modda massa ulushini nisbati 2,74:1 bolsa, shu haroratda tuzning eruvchanligini aniqiang.
A) 58,5 B) 36,5 C) 20,5 D) 35,6
66. (v17-126-9) X g 40% li CaBr2 eritmasini toyintirish uchun 20 g CaBr2 tuzidan qoshish kerak. Tuzning ushbu haroratda eruvchanlik koeffitsiyenti 80 ga teng. Boshlangich eritmada qancha miqdorda (g) tuz bolgan?
A)250 B)150 C)100 D)300
67. (v18-1-194) 300 g 15% li eritma sovitilganda erigan moddaning qismi chokmaga tushdi va uning massa ulushi 8% gacha kamaydi. Chokmaga tushga moddaning massasini toping.
A) 31,3 B) 12,6 C) 22,8 D)45,6
68. (v18-1-195) Malum bir temperaturada toyingan eritma 3 molyarli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 12 ga teng.
A) H2S04 B) HN03 C) NaOH D) KOH
69. (v18-1-196) 30°C da toyingan eritmada suvning massasi tuzning massasidan
2,5 barobar kop bolsa, tuzning shu haroratdagi eruvchanligini aniqiang.
A) 25 B) 60 C) 40 D) 35
70. (v19/20-103-15) Malum bir temperaturada toyingan eritma 5 molyalli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 20 ga teng.
A) КОН B) H2S04 C) NaOH D) HN03
71. (v19/20-106-6) Malum bir temperaturada toyingan eritma 6 molyalli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 24 ga teng.
A) HN03 B) NaOH C) H2S04 D) KOH
72. (v19/20-106-29) Malum bir temperaturada toyingan eritma 7 molyalli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 28 ga teng.
A) H2S04 B) NaOH
C) HN03 D) KOH
73. (v19/20-112-23) Malum bir temperaturada toyingan eritma 2 molyalli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 8 ga teng.
A) KOH B) H2S04
C) HN03 D) NaOH
74. (v19/20-115-21) Malum bir temperaturada toyingan eritma 10 molyalli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddarnng shu temperaturadagi eruvchanlik koeffitsiyenti 40 ga teng.
A) HN03 B) H2S04
C) NaOH D) KOH
75. (v19/20-119-6) Malum bir temperaturada toyingan eritma 3 molyalli bolsa, eritfhada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 12 ga teng.
A) KOH B) HN03
C) NaOH D) H2S04
76. (v19/20-130-26) Malum bir temperaturada toyingan eritma 8 molyalli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 32 ga teng.
A) KOH B) H2S04
C) NaOH D) HN03
77. (v20/21 -102-2) Malum bir temperaturada toyingan eritma 8 molyalli bolsa, eritmada erigan nomalum moddani aniqiang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 32 ga teng.
A) NaOH B) H2S04
C) KOH D) HN03
78. (V20/21-106-16) Mis (II) sulfatning 20°C dagi eruvchanligi 20 ga teng. Shu temperaturada tayyorlangan 600 g eritma tarkibidagi tuz massasini aniqiang.
A)120 B)90 C)150 D) 100
79. (v20/21-106-20) AgN03 ning 0°C dagi eruvchanligi 115 ga teng bolsa, ayni temperaturada 240 g suvda qanday massadagi tuz eriydi.
A)280 B)276 C)48 D) 50
80. (v20/21-110-6) Biror tuzning 80°C dagi eruvchanlik koeffitsiyenti uning 20°C dagi
eruvchanlik koeffitsiyentidan 1,5 barobar kop. Agar shu tuzning 80°C da toyingan 320 g eritmasi 20°C ga qadar sovutilganda 40 g tuz chokmaga tushishi malum bolsa, shu tuzning 80°C dagi eruvchanlik koeffitsiyentini aniqlang. A)60 B)40 C)30 D) 45
81. (v20/21-110-8) Malum bir temperaturada toyingan eritma 2 molyalli bolsa, eritmada erigan nomalum moddaning molekulyar massasini aniqlang. Nomalum moddaning shu temperaturadagi eruvchanlik koeffitsiyenti 12,6 ga teng.
A) 56 B) 82 C) 63 D) 40
82. (v20/21-111-6) Nomalum tuzning xona haroratida eruvchanligi 30 g ga teng. 65 g toyingan eritmasi 0°C gacha sovutilganda 5 g tuz chokmaga tushsa, uning shu gradusdagi eruvchanligini toping.
A)20 B)15 C)25 D)30
83. (v20/21-113-29) Quyidagi qaysi moddaning eruvchanligi harorat ortganda, pasayadi?
A) NaOH B) S02
C) HN03 D) CuS04
84. (V20/21-117-28) 50°C da 60 g suvda
45 g tuz eritilsa toyingan eritma hosil boladi. 30°C da shu tuzning eruvchanligi 50°C dagiga nisbatan 15 g ga kam bolsa, tuzning 30° dagi eruvchanligini toping.
A) 40 B)60 C)36 D) 50
85. (v20/21-120-12) Quyidagi rasmda eruvchanlik-harorat orasidagi bogliqlik berilgan.
30°C da eritmaning toyinishi uchun necha gramm X qoshish kerak?
A)16 B)14 C)12 D)18
86. (V20/21-121-17) Tuzning 10°C va 18°C dagi eruvchanlik koeffitsiyentlari 20 va 30 ga teng.
10°C li suvga 14 g tuz eritilib toyingan eritma olindi. Eritma temperaturasi 18°C gacha oshirildi va eritmada tuz eritilib toyintirildi. Olingan eritma 4°C gacha sovitilganda 17,5 g tuz chokmaga tushdi. Tuzning 4°C dagi eruvchanlik koeffitsiyentini aniqlang.
A) 2 B) 5 C) 4 D) 3
87. (v20/21-122-9) Quyidagi grafiк malumoti asosida X tuzning ayni sharoitdagi eruvchanligini (g/100 ml suv) aniqlang.
Bunda idishdagi quruq tuz tola erib toyingan* eritma hosil bolguncha suv quyilgan.
Natijada 60%li toyingan eritma hosil bolgan.
88. (v20/21-122-24) Biror tuzning 80°C dagi eruvchanlik koeffitsiyenti uning 20°C dagi eruvchanlik koeffitsiyentidan 2,5 barobar kop. Agar shu tuzning 80°C dagi toyingan 300 g eritmasi 20°C ga qadar sovutilganda 60 g tuz chokmaga tushishi malum bolsa, shu tuzning 80°C dagi eruvchanlik koeffitsiyentini aniqlang.
A)50 B)20 C)30 D)75
89. (v20/21 -123-29) 30°C da toyingan eritmada suvning massasi tuzning massasidan 2,5 barobar kop bolsa, tuzning shu haroratdagi eruvchanligini aniqlang.
A) 25 B) 60 C) 35 D) 40
90. (v20/21-133-25) Ochiq idishda massa
ulushi 40%ga teng bolgan kaliy xlorid eritmasi mavjud. suvning bir qismi buglanishi va suvsiz tuzni kristallanishi natijasida eritma massasi 50 g ga kamaydi, lekin undagi tuzning massa ulushi ozgarmadi. Buglangan suv va kristallangan tuz massasini hisoblang. A) 40 va 10 B) 35 va 15
C) 30 va 20 D) 25 va 25
91. (V20/21-138-28) 4°C da 83,8 ml suvda
67,05 g KCIMgCI2nH20 minerali qoshilganda 13,85 g chokmaga tushdi.
KCI ning 4°C dagi eruvchanligi 15 g,
MgCI2 ning 4°C dagi eruvchanligi 22 g. Mineral taribidagi suv molekulasini toping?
A) 3 B)1 C) 4 D) 2
92. (V20/21-140-1) Tuzning 40°C dagi suvdagi toyingan eritmasida tuzning massa ulushu 37,5%. Korsatilgan haroratda tuzning eruvchanlik koeffitsiyentini hisoblang.
A) 37,5 B) 40 C)60 D) 75
93. (v20/21-142-17) CuA-5H20 tarkibli kristallogidratning 50 g ml 32 ml suvda eritilganda, eruvchanligi 64 g bolgan tuz eritmasi hosil boldi. Kislota qoldigini toping? (A - kislota qoldigi)
A) S04 B) C03 C) Cl D) S
94. (V20/21-143-10) Na2A-10H2O tarkibli kristallogidratning 42,9 g mi 23 ml suvda eritilganda, eruvchanligi 31,8 g bolgan tuz eritmasi hosil boldi. Kislota qoldigini toping? (A - kislota qoldigi)
A) S04 B) C03 C) Cl D) S
95. (v21-101-25) Berilgan rasmlarni diqqat bilan organib X g ni toping. NH4CI ning 20°C dagi eruvchanligi 37,2 ga teng.
±
toyinmagan
eritma
A) 3,8 B) 4,6 C) 1,8 D) 2,2
96. (v21-104-9) Tuzning eruvchanlik koeffitsienti 100 g suvda 80°C haroratda 50 g ga teng, 20°C da esa - 20 g. 700 g 80°C dagi toyingan eritmani 20°C gacha
sovutilganda chokmaga tushadigan modda massasini aniqlang.
A)320 B)230 C)140 D)410
97. (v21-108-9) Rasmda qandaydir tuzning eruvchanlik grafigi berilgan. Shu tuzning 40°C da toyingan eritmasini ehtiyotkorlik bilan 20°C gacha sovutildi, keyin unga tuzning kristalli solindi. Bunda:
1) kristal bolakchasi eridi
2) hech qanday ozgarish sodir bolmadi
3) yangi kristallar hosil bolishi va ularning osishi kuzatildi
98. (V21-108-17) Kalsiy xloridning 10°C haroratdagi 100 g suvda eruvchanligi 159 g ga teng. 750 g suvda erishi mumkin bogan tuz massasini aniqlang.
A) 1192,5 B) 119 C) 326 D) 325,5
99. (v21-108-26) Xona haroratida bir tuzning toyingan eritmasidagi massa ulushi 20%.
250 g 30%li toyingan eritma shu haroratgacha sovutilganda chokmaga tushuvchi tuz massasini aniqlang. »
A) 3,1 B) 12,5 C) 62 D) 31,25
100. (v21-108-28) Kaliy bromidning 20 va 80°C haroratdagi 100 g suvdagi eruvchanligi mos ravishda 65 va 95 g ga teng. 20°C gacha sovutilganda 150 g tuz chokmaga tushadigan 80°C dagi toyingan eritma massasini aniqlang. Uni tayyorlash uchun zarur bolgan tuz va suv miqdorini aniqlang.
A) 975; 500; 475 B) 975; 300; 675
C) 500; 475; 475 D) 475; 500; 475
101. (v21-110-4) Natriy ftoridning 0°C haroratdagi 100 g da eruvchanligi 4,1 g ga, 40°C da esa - 4,5 g ga teng. 500 g toyingan eritmani 40 dan 0°C gacha sovutilganda chokmaga tushadigan natriy ftorid massasomo aniqlang.
A) 38,23 B) 19 C) 0,235 D) 1,914
102. (V21-110-17) 20°C haroratdagi 300 ml (p = 1,174 g/ml) toyingan eritmani 0°C gacha sovutilganda chokmaga tushadigan kaliy xlorid massasini aniqlang.
S20(KCI) = 34,4 g/100 gH20;
S°(KCI) = 28 g/100 g H20
A) 38,6 B) 16,8 C) 6,8 D) 18
103. (V21-110-23) 100 g suvda 20°C da 108,7 g natriy gidroksid eriydi. 20°C haroratda 40 g toyingan eritma hosil qilish uchun ishqor va suv necha g dan olish kerak?
A) 19,2; 19,2 B) 20,3; 20,3
C) 20,3; 19,2 D) 10,6; 20,4
104. (v21-111-26) 80°
Agar 100°C da 100 g suvda 155 g, 0°C da esa 111 g potash erib, toyinga
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33. Eruvchanlik