Đáp án:
1/
CaF2 + H2SO4đ $\buildrel{{t^o}}\over\longrightarrow$ CaSO4 + 2HF
2HF $\buildrel{{t^o}}\over\longrightarrow$ F2 + H2
F2 + Cu $\buildrel{{t^o}}\over\longrightarrow$ CuF2
CuF2 + 2HCl --> CuCl2 + 2HF
4HF +SiO2 --> SiF4 +2H2O
2/
Cl2 + Ca(OH)2 → CaOCl2 + H2O
2CaOCl2 + H2O + CO2→ CaCO3 + CaCl2 + 2HClO
CaCO3 +2HCl --> CaCl2 + CO2 + H2O
CO2 + H2O + NaClO --> NaHCO3 + HClO
HClO + NaOH --> H2O + NaClO
3/
Cl2 + 2NaBr --> 2NaCl + Br2
Br + H2O ⇄ HBr + HBrO
HBrO + NaOH --> H2O + NaBrO
4/
2HCl + CuO --> CuCl2 + H2O
CuCl2 +2KOH -->Cu(OH)2 + 2KCl
2KCl + 2H2O $\buildrel{{đpdd,cmn}}\over\longrightarrow$ 2KOH +Cl2 +H2
6KOHđ +3Cl2 $\buildrel{{t^o}}\over\longrightarrow$ KClO3 + 5KCl + 3H2O
2KClO3 $\buildrel{{t^o}}\over\longrightarrow$ 2KCl + 3O2
Giải thích các bước giải:
