3Zn+2Fe<span>→3ZnBr2+2Fe
2AgCl</span><span>→2Ag+Cl2
3CaO+P2O5</span><span>→Ca3(PO4)2
FeCl3+3NaF</span><span>→FeF3+3NaCl
2KClO3</span><span>→2KCl+3O2
2Na+2NH3</span><span>→2NaNH2+H2
2Al+WO3</span><span>→W+Al2O3
2CO+O2</span><span>→2CO2
2FeCl2+Cl2</span><span>→2FeCL3
2Al+3CuSO4</span><span>→Al2(SO4)3+3Cu
(CuOH)2CO3</span><span>→2CuO+H2O+CO2
Mg+2H2O</span><span>→Mg(OH)2+H2
B2O3+3H2O</span><span>→2H3BO3
2F2+2H2O</span><span>→4HF+O2
(NH4)2Cr2O7</span><span>→N2+Cr2O3+4H2O
2Fe+3Cl2</span><span>→2FeCl3
Al(OH)3+3NaOH</span><span>→Na3[Al(OH)6]</span>
WO3 + 3H2 = <span>W + 3H2O.
Проверяем:
по вольфраму: один до равенства(ничего не пишется) и один после,
по водороду: 3*2=6 до равно и 3*2=6 -- после,
по кислороду: 3 до "=" и 3 после.</span>
1.
1) 2K + 2H2O -> 2KOH + H2
2) 2KOH + H2SO4 -> K2SO4 + 2H2O
3) K2SO4 + Ba(NO3)2 -> BaSO4 + 2KNO3
2.
1) 2Na + 2H2O = 2NaOH + H2
2) 3NaOH + H3PO4 = Na3PO4 + 3H2O
3) Na3PO4 + 3AgNO3 = Ag3PO4 + 3NaNO3
3.
1) 2Na + 2H2O = 2NaOH + H2
2) 2NaOH + H2SO4 = Na2SO4 + 2H2O
<span> 3) Na2SO4 + Ba(NO3)2 = BaSO4 + 2NaNO3
Прошу вас.</span>
NaOH + HNO3 = NaNO3 + H2O
NaOH + HNO3 = NaNO3 + H2O
2NaOH + CO2 = Na2CO3 + H2O
2NaOH + CuSO4 = Cu(OH)2 + Na2SO4
6NaOH + P2O5 =2 Na3PO4 + 3H2O