1)AlBr3+HOH=AlOHBr2+HBr
Al(3+) +3Br(-) +HOH=AlOH(2+) +2Br(-) +H(+) +Br(-)
<span>Al(3+) +HOH=AlOH(2+) +H(+)
2)</span>FeCl2<span> + HOH ↔ FeOHCl + HCl</span>
Fe2+<span> + 2Cl</span>-<span> + H</span>2O ↔ FeOH+<span> + Cl</span>-<span> + H</span>+<span> + Cl</span>-
Fe2+<span> + H</span>2O ↔ FeOH+<span> + H</span><span>+
3)</span> CuSO4<span> + 2H</span>2O = Cu(OH)2<span> + H</span>2SO4
Cu2+<span> + SO</span>42-<span> + 2H</span>2O = Cu(OH)2<span> + 2H</span>+<span> + SO</span>4<span>2-
4)</span><span>KNO2 + H2O = KOH + HNO2 </span>
<span>K+ + NO2- + H2O = K+ + OH- + HNO2 </span>
<span>NO2- + H2O = OH- + HNO2</span><span>
</span>
Делов то M(H2S) =2+32=34
2:34=6% массовая доля водорода
32:34=94% доля серы
1s 2<span>2s </span>2<span>2p </span><span>1</span>
3ch3ch2ch=chch3+2kmno4+4h2o=3ch3ch2ch(oh)ch(oh)ch3+2koh+2mno2