Kimyoviy bog‘lanish

03-9son-40.
229. 24% li bariy nitrat eritmasidan 300 g tayyorlash uchun uning 7% li eritmasidan va Ba(NO₃)₂•H₂O dan qanday miqdorda (g) olinishi zarur?
A) 231: 69 B) 241: 59 C) 211: 89 D) 200: 100
E) 150: 150
03-9son-41.
230. 29,575% li eritma hosil qilish uchun 600 g 9,1% li mis(II) atsetat eritmasida qancha miqdorda (g) mis(II) atsetat kristallogidrat Cu(CH₃COO)₂•H₂O ni eritish zarur?
A) 400 B) 300 C) 200 D) 20 E) 50
03-9son-42.
231. 30% li eritma tayyorlash uchun 300 g 10% li bariy nitrat eritmasida qancha miqdorda (g) Ba(NO₃)₂•H₂O ni eritish zarur?
A) 31 B) 20 C) 150 D) 94,5 E) 41
03-9son-43.
232. 22,4% li MgCl₂ eritmasini hosil qilish uchun 8,2% li magniy xlorid eritmasining 200 g miqdorida qancha massa (g) MgCl₂•6H₂O eritilishi zarur?
A) 350 B) 206,5 C) 116,4 D) 216 E) 41,6
03-9son-44.
233. 3,8% li temir(II) sulfat eritmasini tayyorlash uchun uning 1,2% li 200 g eritmasida qancha miqdorda (g) FeSO₄•7H₂O eritilishini hisoblang.
A) 16,2 B) 13,1 C) 12,4 D) 10,2 E) 14,1
03-9son-45.
234. 16% li mis(II) sulfat eritmasini hosil qilish uchun uning 6% li 200 g eritmasida qancha miqdorda (g) mis kuporosi CuSO₄•5H₂O eritilishi lozimligini toping.
A) 275 B) 175 C) 46,1 D) 47,6 E) 41,6
03-9son-46.
235. 12% li rux sulfat eritmasini tayyorlash uchun uning 200 g 4% li eritmasida eritilishi lozim bo‘lgan rux sulfat kristallogidrati ZnSO₄•6H₂O massasini (g) toping.
A) 41,4 B) 43,4 C) 53,3 D) 63,4 E) 33,4
03-9son-47.
236. 24% li Na₂CO₃ eritmasini tayyorlash uchun uning 300 g 8% li eritmasida qancha miqdorda (g) kristall soda Na₂CO₃•10H₂O eritilishi zarurligini toping.
A) 250,5 B) 243,75 C) 369,2 D) 158,5 E) 160,5
03-9son-48.
237. 16% li mis(II) sulfat eritmasini hosil qilish uchun 200 g mis kuporosi CuSO₄•5H₂O qanday massadagi (g) 4% li mis(II) sulfat eritmasida eritilishi zarurligini toping.
A) 600 B) 800 C) 500 D) 300 E) 400
03-9son-49.
238. 24% li mis(II) sulfat eritmasini hosil qilish uchun 200 g mis kuporosi CuSO₄•5H₂O 8% li mis(II) sulfat eritmasining qanday miqdorida (g) eritilishi zarurligini toping.
A) 500 B) 400 C) 300 D) 200 E) 100
03-9son-50.
239. 26% li MgCI₂ eritmasini hosil qilish uchun 203 g MgCI₂•6H₂O ni qanday miqdordagi (g) 6% li magniy xlorid eritmasida eritish zarur?
A) 211,12 B) 311,12 C) 99,8 D) 201,24 E) 306,6
03-10son-1.
240. 34% li natriy karbonat eritmasini hosil qilish uchun 28,6 g kristall sodani qanday miqdordagi (g) 14% li natriy karbonat eritmasida eritish zarur?
A) 129,26 B) 201,76 C) 139,67 D) 190,67
E) 4,38