<span>2 Na + O2 => Na2O2 </span>
<span>Na2O2 + 2 Na => 2 Na2O </span>
<span>Na2O + H2O => 2 NaOH</span>
<span>2 NaOH + CO2 => Na2CO3 + H2O </span>
2Fe(OH)3+3H2SO4=Fe2(SO4)3+6H2O
m(H2SO4)=500*0.2=100 г
n(H2SO4)=100/98=1.0204 моль
x=1.0204
2=3
x=0.6803
n(Fe(OH)3=0.6803 моль
m(Fe(OH)3)==0.6803*107=72.8 г
<span>Al2O3 + H2SO4 = Al2(SO4)3 + 3H2O</span>
1. CuSO4 + HCl ≠
2. 2NaOH + CuSO4 = Cu(OH)2 + Na2SO4
3. BaCl2 + CuSO4 = BaSO4 + CuCl2
4. CuSO4 + Fe = FeSO4 + Cu
5. Zn(OH)2 + CuSO4 = ZnSO4 + Cu(OH)2
6. CuSO4 + Ag ≠
7. Na2S + CuSO4 = CuS + Na2SO4
8. AgCl + CuSO4 ≠