1) Ile gramów azotanu(V)srebra i wody potrzeba do sporządzenia 0,5kg 30% roztworu AgNO3?
2) Zaproponuj 4 różne metody otrzymywania Na2SO4
3)Zaproponuj metody otrzymywania:
a) NaOH
b)HNO3
c)CO2
d)HBr
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zadanie 1
mr = 0,5kg = 500g
cp = 30%
ms = mr x cp100%
ms = 500g x 30%/100% = 150g
zadanie 2
2Na + H₂SO₄ --> Na₂SO₄ + H₂
Na₂O + H₂SO₄ --> Na₂SO₄ + H₂O
2NaOH + H₂SO₄ --> Na₂SO₄ + 2H₂O
Na₂O + SO₃ --> Na₂SO₄
zadanie 3
Na₂O + H₂O --> 2NaOH
N₂O₅ + H₂O --> 2HNO₃
C + O₂ --> CO₂
H₂ + Br₂ --> 2HBr
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Feci, quod potui, faciant meliora potentes
Pozdrawiam :)
1. 500g to 100%
x to 30% wiec x= (500*30)/100
x= 150g Potrzeba 150 gramów AgNO3
2. H2SO4+ 2Na--> Na2SO4+ H2(go góry strzałka
H2SO4+ NaOH-->Na2SO4+ H2O
H2SO4+ Na2CO3--> Na2SO4+ H2O+CO2
Ca(HSO4)2+2NaOH--> Na2S04+CaSO4+2H2O
3. a) Na +H2O--> NaOH +H2
b) H2O+ NO2--> HNO3
c) C2H2 +2O2--> 2CO2+H2O
d) C2H6+ Br2--> C2H5Br+ HBr