nazorat ishi Davriy jadvalda nechta oila mavjud A. B. S. 5 D

Nazorat ishi- 4

I variant

1. 46 gr Na metalining 300 g suvda erishi natijasida hosil bo’lgan eritmadagi NaOH ning foiz konsentrasiyasini toping.

2. 275 g suvda 50 g mis kuporosi eritilishi natijasida hosil bo’lgan eritmaning konsentrasiyasini (foizda) toping.

3. masala: 300 g 5 % li va 400 g 20 % li NaCl eritmalari bir idishga solib aralashtirilishidan hosil bo‘lgan eritmaning foiz konsentratsiyasini (%) hisoblang.

4. Sulfat kislotani 5 % li eritmasini tayyorlash uchun 1005 g suvda qancha hajm sulfat angidrid eritilishi kerak?

5. 56 % li (ρ = 1,46 g/ml) H₂SO₄ eritmasining normal konsentrasiyasini aniqlang.

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