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1. Ba → BaO → Ba(OH)2 → BaCO3 → Ba(NO3)2
2. Na →Na2O → NaOH → Cu(OH)2 →CuO → CuSO4
3.Zn → ZnO → ZnCl2 → Zn(OH)2 → ZnSO4
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Answers & Comments
1. 2Ba + O2 = 2BaO
BaO + H2O = Ba(OH)2
Ba(OH)2 + CO2 = BaCO3 + H2O
BaCO3 + 2HNO3 = Ba(NO3)2 + H2O + CO2
2. 4Na + O2 = 2Na2O
Na2O + H2O = 2NaOH
2NaOH + CuCl2 = Cu(OH)2 + 2NaCl
Cu(OH)2 (t)= CuO + H2O
CuO + H2SO4 = CuSO4 + H2O
3. 2Zn + O2 = 2ZnO
ZnO + 2HCl = ZnCl2 + H2O
ZnCl2 + 2NaOH = Zn(OH)2 + 2NaCl
Zn(OH)2 + H2SO4 = ZnSO4 + 2H2O