2Fe(OH)3+3H2SO4=Fe2(SO4)3 +6H2O
2Fe + 3OH +3H +3SO4 =2Fe +3SO4 + 3H2O
3OH+3H=3H2O
1)CuSO4+2NaOH=Cu(OH)2+NaSO4
2)Cu(OH)2+2HCl=2H20+CuCl2
3)CuCl2+Na2S=CuS(стрелка вниз)+2NaCl
1) ...=2KCl+H2O
2)....=K2SO4+H2O
3)2<span>H3PO4+K2O=2</span>KPO4+3H2O
<span>54.5% 9.1% 36.4%
С H O
12 1 16
C:H:O = 54.5/12 : 9.1/1 : 36.4/16 = 4.54: 9.1: 2.275 = 2:4:1
Т.е. простейшая формула С2Н4О (M=12*2+4*1+16=44)
D(H2)=M(CxHyOz)/2=44
M(CxHyOz)=44*2=88
Истинная формула: C4H8O2
</span>
<span>HCI+AgNO3->AgCI+HNO3</span>