Kimyoviy bog‘lanish

02-11son-7.
39. 30⁰C da KNO₃ ning 50 g 20% li eritmasining to‘yinishi uchun yana 6,8 g KNO₃ tuzi qo‘shilishi kerak bo‘lsa, shu tuzning eruvchan-ligini aniqlang.
A) 34 B) 42 C) 16 D) 43,2 E) 37,5
02-12son-13.
40. Vodorod bromidning n.sh.da suvdagi eruvchanligi 221 g. SHunday sharoitda bir hajm suvda necha hajm vodorod bromid eriydi?
A) 611 B) 620 C) 711 D) 720 E) 511
02-12son-30.
41. Kalsiy bromidning 80 g to‘yingan eritmasiga 20 g suvsiz tuz solinib, aralashmadagi tuz erib ketgunga qadar qizdirildi va so‘ngra boshlang‘ich temperaturaga qadar sovutildi. Bunda 41,52 g kristallogidrat cho‘kmaga tushdi. To‘yingan eritmadagi suvsiz tuzning massa ulushi 58,7% teng. Kristallogidratning formulasini toping.
A) CaBr₂•3H₂O B) CaBr₂•6H₂O C) CaBr₂•5H₂O
D) CaBr₂•2H₂O E) CaBr₂•8H₂O
02-12son-31.
42. 60⁰C da AgNO₃ ning to‘yingan eritmasi 20⁰C gacha sovutilganda, 15 g tuz cho‘kmaga tushishi uchun qancha tuzni qancha suvda eritish kerak?
[E(20⁰C)=222, E(60⁰C)=522]
A) 26,1 g AgNO₃, 5 g suv B) 30,1 g AgNO₃, 5 g suv
C) 36,2 g AgNO₃, 10 g suv D) 16,1 g AgNO₃, 5 g suv
E) 40,5 g AgNO₃, 5 g suv
03-2son-7.
43. Qanday jarayonlar tufayli qattiq modda eriganda, issiqlik yutiladi?
1) erigan modda zarrachalarining gidratlanishi
2) modda eriganda, kristall panjaraning buzilishi
3) erishning erituvchi tabiatiga bog‘liq bo‘lishi
A) 1 B) 2 C) 3 D) 1,2 E) 2,3
03-5son-43.
44. 20⁰C da 545 g bariy nitrat eritmasida 45 g tuz erigan bo‘lsa, shu haroratdagi bariy nitratning eruvchanligini toping.
A) 12,2 B) 8,3 C) 9 D) 15,2 E) 18,8
03-5son-44.
45. 0⁰C da 50 g kaliy sulfat eritmasida 3,44 g tuz erigan bo‘lsa, uning eruvchanlik koeffitsientini va tuzning eritmadagi massa ulushini (%) hisoblang.
A) 7,4: 6,88 B) 14,5: 7,3 C) 11,5: 5,7
D) 9,4: 8,38 E) 6,4: 5,62