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nazorat ishi Davriy jadvalda nechta oila mavjud A. B. S
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| bet | 8/13 | | Sana | 29.11.2023 | | Hajmi | 60,83 Kb. | | #107627 |
Bog'liq 1- nazorat ishi Davriy jadvalda nechta oila mavjud A. 3 B. 4 S. -hozir.orgO’qituvchi Bahosi : ____________
Nazorat ishi- 4
II variant
1. 23 gr Na metalining 300 g suvda erishi natijasida hosil bo’lgan eritmadagi NaOH ning foiz konsentrasiyasini toping.
2. 225 g suvda 50 g mis kuporosi eritilishi natijasida hosil bo’lgan eritmaning konsentrasiyasini (foizda) toping.
3 200 g 15 % li va 500 g 20 % li NaCl eritmalari bir idishga solib aralashtirilishidan hosil bo‘lgan eritmaning foiz konsentratsiyasini (%) hisoblang.
4. Sulfat kislotani 15 % li eritmasini tayyorlash uchun 850 g suvda necha gramm sulfat angidrid eritilishi kerak?
5. KOH ning (ρ = 1,286 g/ml) 30% li eritmasini normalligini toping.
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