1) CaCO3+2HCl=CaCl2+H2O+CO2
2) CuSO4+2NaOH=Cu(OH)2⬇️+Na2SO4
А) <span>S + 3KBrO + H2O = H2SO4 + 3KBr, баланс:
</span>S -6e- + 4H2O = (SO4)2- + 8H+ | 6 | 6 | 1 |
<span>(BrO)- +2e- + 2H+ = Br- + H2O | 2 | | 3 |;</span>
<span>S + 3(BrO)- + H2O = (SO4)2- + 3Br- + 2H+;
б) </span><span>Cl2 + Zn + 4NaOH = Na2[Zn(OH)4] + 2NaCl, ба</span>ланс:
Cl2 +2e- = 2Cl- | 2 | 2 | 1 |
Zn -2e- + 4OH- = [Zn(OH)4]2- | 2 | | 1 |;
Cl2 + Zn + 4OH- = 2Cl- + [Zn(OH)4]2-;
в) <span>2Cl2 + Sn + 6NaOH = Na2[Sn(OH)6] + 4NaCl, баланс:
</span>Cl2 +2e- = 2Cl- | 2 | 4 | 2 |
Sn -4e- + 6OH- = [Sn(OH)6]2- | 2 | | 1 |;
2Cl2 + Sn + 6OH- = 4Cl- + [Sn(OH)6]2-.
CaCO3=CaO+CO2
CaO+3C=CaC2+CO
CaC2+2H2O=Ca(OH)2+C2H2
C2H2+2,5O2=2CO2+H2O
СO2+CaO=CaCO3
H2S + Ba(OH)2=BaS + 2H2O
2HClO4 + Ba(OH)2=Ba(ClO4)2 + 2H2O
I2 + H2S = 2HI + S
I2 + 2HClO4 = 2HIO4 + Cl2
Щелочи; КОН
нерастворимые: Ca(ОН)2, AI(ОН)3, MG(ОН)2
Надеюсь, помогла.