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Answer to Question #56296 in General Chemistry for tracy guido

Question #56296
Ionic equations for the following thank you for your help
4Li(s) + O2(g) → 2Li2O(s)
4Na(s) + O2(g) → 2Na2O(s)
2Ca(s) + O2 (g) 2CaO (s)
Ca (s) + 2HCl (aq) CaCl2 (aq) + H2 (g)
4Al(s) + 3O2(g) → 2Al2O3(s)
2Al(s) + 6H2O(l) → 2Al(OH)3 + 3H2(g)
Expert's answer
4Li(s) + O2(g) → 2Li2O(s) ‒ all substances in this reaction do not dissociate to the ions in water solution, that’s why there is no ionic equation for this reaction

4Na(s) + O2(g) → 2Na2O(s) ‒ no ionic equation for this reaction

2Ca(s) + O2(g) → 2CaO(s) ‒ no ionic equation for this reaction

Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g)
Ca(s) + 2H+(aq) + 2Cl-(aq) → Ca2+(aq) + 2Cl-(aq) + H2(g) ‒ full ionic equation
Ca(s) + 2H+(aq) → Ca2+(aq) + H2(g) ‒ net ionic equation

4Al(s) + 3O2(g) → 2Al2O3(s) ‒ no ionic equation for this reaction

2Al(s) + 6H2O(l) → 2Al(OH)3(s) + 3H2(g) ‒ no ionic equation for this reaction

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