Kimyoviy bog‘lanish

03-1son-11.
340. 20 g o‘yuvchi natriy eritmasi 23,6 g oleumni neytrallashga sarf bo‘ldi. Oleumdagi sulfat angidridning har bir molekulasiga nechta sulfat kislota molekulasi to‘g‘ri kelishini hisoblang.
A) 1 B) 2 C) 0,25 D) 3 E) 4
03-2son-5.
341. 10% li natriy gidroksid eritmasini hosil qilish uchun 30% li 50 g NaOH ga qancha (g) suv qo‘shish kerak?
A) 100 B) 60 C) 70 D) 150 E) 90
00-9son-40.
342. Suvning 300 litrida 43,8 g Mg(HCO₃)₂ borligini bilgan holda, shu suvning muvaqqat qattiqligini (mg-ekv) aniqlang.
A) 1 B) 2 C) 2,5 D) 1,5 E) 3
00-10son-22.
343. Oltingugurt(VI) oksidning massa ulushi 8% bo‘lgan eritmasidagi sulfat kislotaning massa ulushini hisoblang.
A) 8 B) 9,8 C) 16 D) 49 E) 98
01-7son-1.
344. Hajmi 100 ml (ρ=1,16 g/ml) bo‘lgan nitrat kislotaning 25% li eritmasida nechta kislorod atomi bor?
A) 8,9•10²³ B) 9•10²⁴ C) 12•10²³ D) 37,4•10²³
E) 2,7•10²³
01-7son-48.
345. Konsentratsiyasi 45% bo‘lgan perxlorat kislotaning 100 g eritmasidagi kislorod atomlari sonini hisoblang.
A) 18,4•10²⁵ B) 1,2•10²⁵ C) 1,08•10²⁴
D) 4,6•10²⁵ E) 29,2•10²³
01-7son-49.
346. Tarkibida 100 ml 65% li (ρ=1,47 g/ml) ortofosfat kislota bo‘lgan eritmadagi vodorod atomlari sonini hisoblang.
A) 17,2•10²³ B) 4,96•10²⁴ C) 1,76•10²⁴
D) 24,2•10²³ E) 52•10²³
01-7con-50.
347. Magniy sulfatning 5% li eritmasini tayyorlash uchun 400 g MgSO₄•7H₂O olindi. Hosil bo‘lgan eritmaning massasini (kg) toping.
A) 1,95 B) 2,46 C) 1,20 D) 8,0 E) 3,90
01-12son-25.
348. Tarkibida 6,02•10²³ kislorod atomi bo‘lgan KCIO₄ tuzi xuddi shuncha kislorod atomi bo‘lgan suvda eritildi. Hosil bo‘lgan eritmadagi tuzning massa ulushini toping.
A) 0,66 B) 0,35 C) 0,30 D) 0,76 E) 0,8
02-12son-2.
349. Eritmadagi suvning tarkibida 3,612•10²⁴ ta vodorod atomi bo‘lgan 23% li HCI eritmasining va suvsiz kislotaning massasini toping.
A) 16,1; 70,1 B) 17,2; 65,1 C) 19,00; 65,1
D) 16,1; 87,6 E) 14,5; 70,1
02-12son-3.
350. Tarkibida 11,2 mol vodorod atomi bor AI₂(SO₄)₃ eritmasining konsentratsiyasi 44% ga teng bo‘lsa, eritma va erigan modda massasini toping.
A) 180; 79,2 B) 110; 70,5 C) 120; 67,4
D) 180; 70,5 E) 101; 79,2
02-12son-4.
351. Ikkita HCl eritmalarining orasidagi konsentratsiyalari orasidagi nisbat 1:2 ga teng. Ikkala eritmaning umumiy hajmi 25 l bo‘lsa, konsentratsiyasi kichik bo‘lgan eritmaning hajmi necha litr bo‘ladi (Ikkala eritmada bir xil massada HCI eritilgan)?
A) 16,67 B) 10,0 C) 15,56 D) 17,77 E) 18,88