identify the anions, cationsand charge present on them in the following molecules
HCl, NaCl, H2O, Al2O3

1) HCl 
Cation = hydrogen (H+
Anion = Chloride (Cl-)

2) NaCl
Cation = Na+
Anion = Cl​-

3) H2O
Cation = H+
Anion = OH-

4) Al2O
Cation = Al3+
Anion = O2-

 

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