1. Элементни топинг -2 Эквивалентга оид

0,12 * 400 + 0,441x
------------------------------ = 0,08 x = 44,8g
400 + x
53. Ишланиши – Криталлогидратларга оид - 2. (ЭРИТМА)

1. Na₂SO₄∙nH₂O tarkibli kristalgidrat o’z massasidan 3 marta ko’p suvda eritilganda 12,412% li ertima olindi. n-qiymatini toping. A) 10 B) 8 C) 7 D) 9

142
1 – usul . Na₂SO₄ * nH₂O ------------------------------------ = 0,12412
142 18n (142 + 18n) + (142+18n)*3 n = 8 mol H₂O

6. X SO₄∙5H₂O o’z massasidan 3 marta ko’p suvda eritildi va 15,7% li eritma olindi. Metallni toping.

A) Cu B) Cd C) Zn D) Fe


2 – usul MeSO₄ * 5H₂O
x
------------------------------ = 0,157
(x + 90 ) + 3 ( x + 90) x = 152 – 96 = 56 Bu – Fe

63. Ишланиши – Криталлогидратларга оид - 4.
1. X SO₄∙nH₂O da vodorodning massa ulushi 5,035% ga kislorodning massa ulushi esa 63,31% gat eng bo’lsa bu miqdorning 0,3 moliga teng massadagi suv molekulalar sonini toping.
A) 2,78∙10²⁴ B) 27,8∙10²⁴ C) 1,394∙10²⁴ D) 8,36∙10²⁴
1 – usul . XSO₄ *nH₂O
5,035% / 2 *18 = 45,315% suvning foizi 100% - 45,315% = 54,685% XSO₄ ni foizi
5,035% / 2 *16 = 40,28% suvdagi kislorodning foizi
63,31% - 40,28% = 23,03% XSO₄ dagi kislorodni foizi


64g kislorod --------- 96g SO₄ da
23g kislorod -------- - x X = 34,545% SO₄ ni foizi 54,685 – 34,545 = 20,14% bu Metal