Đáp án:
a. Cu(OH)2, KOH, Fe(OH)3, Mg(OH)2, NaOH
b. Cu(OH)2, Fe(OH)3, Mg(OH)2
c. KOH, NaOH
d. KOH, NaOH
Giải thích các bước giải:
a. Cu(OH)2, KOH, Fe(OH)3, Mg(OH)2, NaOH
Cu(OH)2+ 2HCl → CuCl2 + 2H2O
KOH+HCl → KCl +H2O
Fe(OH)3+3HCl → FeCl3+3H2O
Mg(OH)2 + 2HCl → MgCl2 + 2H2O
NaOH + HCl → NaCl +H2O
b. Cu(OH)2, Fe(OH)3, Mg(OH)2
Cu(OH)2 → CuO +H2O
2Fe(OH)3 → Fe2O3+3H2O
Mg(OH)2 → MgO +H2O
c. KOH, NaOH
KOH + CO2 → KHCO3
2KOH + CO2 → K2CO3 + H2O
NaOH +CO2 → NaHCO3
2NaOH +CO2 → Na2CO3 + H2O
d. KOH, NaOH