How many of the following are acidic and basic in an aqueous solution?
CO2 MgO HCl Na2O HNO3 NO2 H2SO4 SO2 K2O KOH
Answer: 7 acidic 3 basic
I couldn’t find the correct answer, what is wrong with my work?
CO2 + H2O — H2CO3 = Acidic
MgO + 2H2O — Mg(OH)2 + H2 = Basic
HCl + H2O — Cl⁻ + H3O⁺ = Acidic
Na2O + H2O — 2NaOH = Basic
HNO3 + H2O — NO3⁻ + H3O⁺ = Acidic
NO2 + H2O — HNO3⁻ + H⁺ = Acidic
H2SO4 + H2O — H3O⁺ + HSO4⁻ = Acidic
KO2 + H2O — 2KOH = Basic
KOH + H2O — K⁺ + H2O + HO⁻ = Basic