<span>N2O5 + H2O = 2HNO<span>3
</span></span><span>2Fe + 6HNO3 = 2Fe(NO3)3 + 3H<span>2
</span></span>
<span>Б) HNO3</span>
X=(400*0,2)/(400+120)=0,153(15,3%)
+2 -2 +1 -1 +2 +6 -2 -2
PbS+4H2O2=PbSO4+4H2O
S(-2) ------- -8e--S(+6) 8 1 восстановитель
O(-1) +1t-O(-2) 1 8 окислитель
Na2SO4 + Ba(OH)2 = BaSO4↓ + 2NaOH2Na+ + SO42− + Ba2+ + 2OH− = BaSO4↓ + 2Na+ + 2OH−SO42− + Ba2+ = BaSO4↓ K2SO4 + Ba(OH)2 = BaSO4↓ + 2KOH2K+ + SO42− + Ba2+ + 2OH− = BaSO4↓ + 2K+ + 2OH−SO42− + Ba2+ = BaSO4