<span>Fe<span>(HCO3)</span>2</span> = <span>FeCO3</span> + <span>H2O</span> + <span>CO<span>2</span></span>
А) 4Al + 3O2 = 2Al2O3
Al2O3 + 3H2O = 2AlOH3
2Al(OH)3 + 3H2SO4 = Al2(SO4)3
Al2(SO4)3 + 3BaCl2 = 2AlCl3 + 3BaSO4
б) H2 + Br2 = 2HBr
HBr + NaOH = NaBr + H2O
NaBr -> H2 -> Ca -> CaBr2
2NH3 + CaBr2 + 2H2O = NH4Br + Ca(OH)2
1) 3Na + Al(OH)3 => 3NaOH + Al
2) 2NaOH + H2CO3 => Na2CO3 + 2H2O
3) Na2CO3 + 2HCl => 2NaCl + H2CO3
4) NaCl + K => Na + KCl
2)
CO2 + 2Cu(OH)2 = (CuOH)2CO3 + H2O
Образуется осадок — малахит.
Cu(OH)2 + H2S = CuS + 2H2O
Образуется осадок и вода.