Kimyoviy bog‘lanish

01-7son-30.
212. Konsentratsiyasi 25% bo‘lgan eritma tayyorlash uchun bariy xloridning 300 g 15% li eritmasiga qanday massadagi (g) bariy xloriddan qancha (g) qo‘shish kerak?
A) 32 B) 40 C) 25 D) 20 E) 50
01-8son-18.
213. 4,5% eritma (ρ=1,03 g/ml) hosil qilish uchun 500 ml 20% li osh tuzi eritmasini (ρ=1,15 g/ml) qanday hajmgacha (l) suyultirish kerak?
A) 2.12 B) 2.05 C) 2.28 D) 3.15 E) 2.48
02-4son-10.
214. 15% li ammoniy gidroksid eritmasini tayyorlash uchun 200 g 10% li ammoniy gidroksid eritmasida qancha litr (n.sh.da) ammiakni eritish kerak?
A) 69 B) 1,7 C) 3,5 D) 7,5 E) 15,5
02-6son-45.
215. Po‘latdagi xromning massa ulushi 1% bo‘lishi uchun massasi 60 kg bo‘lgan po‘latga ferroxrom qotishmasining qanday massasini (g) qo‘shish kerak? (Xromning ferroxromdagi massa ulushi 0,65 ga teng)
A) 943,5 B) 923,1 C) 937,5 D) 888,8 E) 999,9
03-4son-45.
216. 26% li ishqor eritmasini hosil qilish uchun uning 30% li 100 g eritmasiga 10% li eritmasidan qanday miqdorda qo‘shish kerak.
A) 25 B) 50 C) 100 D) 10 E) 20
03-7son-54.
217. 16% li 200 g mis(II) sulfat eritmasini tayyorlash uchun mis kuporosi va suvdan qanchadan (g) olish kerak?
A) 50: 150 B) 100: 100 C) 25: 175
D) 150: 50 E) 40: 160
03-11son-36.
218. 8% li 600 g mis(II) sulfat eritmasini tayyorlash uchun mis kuporosi va suvdan qanchadan (g) olish kerak?
A) 50: 550 B) 75: 525 C) 525: 75
D) 400: 200 E) 30: 570
03-11son-37.
219. 16% li 400 g temir(III) sulfat eritmasini tayyorlash uchun temir kuporosi (Fe₂(SO₄)₃•12H₂O) va suvdan qanchadan (g) olish kerak?
A) 98,6: 301,4 B) 301,4: 98,6 C) 110,4: 289,6
D) 50: 350 E) 100: 300
03-11son-38.
220. 20% li 300 g rux sulfat eritmasini tayyorlash uchun rux kuporosi (ZnSO₄•6H₂O) va suvdan qanchadan (g) olish kerak?
A) 200: 100 B) 100: 200 C) 150: 150
D) 25: 275 E) 50: 250