Which of the following are present in a dilute aqueous solution of hydrochloric acid?

Options

A. `H_(3)O^(+)+Cl^(-)`
B. `H_(3)O^(+) + OH^(-)`
C. `Cl^(-) + OH^(-)`
D. Unionised HCl

Answer

A

Explanation

When acid is mixed with water , their molecules dissociate to form ions The `H^(+)` ions combine with `H_(2)O` to form `H_(3)O^(+)` ions.
`HCl+H_(2)OrarrH^(+)+Cl^(-)+H_(2)O`
`H_(2)O+H^(+)rarrH_(3)O^(+)`(Hydronium ion)