Why the following compounds will produce acidic solution in water
i. `H_(3)PO_(4)`
ii. `CO_(2)`
iii. `HNO_(2)`
iv. `AICI_(3)`

Explanation

a. All of them give `H^(o+)` ions in squeous solution.
i. `H_(3)PO_(4) rarr H^(o+) +H_(2)PO_(4)^(Θ)`
ii. `CO_(2) + H_(2)O rarr H_(2)CO_(3) rarr H^(o+) + HCO_(3)^(Θ)`
iii. `HNO_(2) rarr H^(o+) + NO_(2)^(Θ)`
iv `A1CI_(3) + H_(2)O rarr [A1(H_(2)O)_(6)]^(3+)CI_(3)`
`[A1(H_(2)O)_(6)]^(3+) rarr [A1(H_(2)O)_(5)(OH)]^(2+) + H^(o+)`