1.

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

Answer»

`H_(3)O^(+)+Cl^(-)`
`H_(3)O^(+)+OH^(-)`
`Cl^(-) +OH^(-)`
UNIONISED HCl

Solution :Hydrochloric acid ionises as FOLLOWS:
`HCl rarr H^(+) + Cl^(-)`
`H^(+)` ions combine with water MOLECULES to FORM `H_(3)O^(+)` . THEREFORE, the ions present in dilute aqueous solution of hydrochloric acid are `H_(3)O^(+)` and `Cl^(-)`


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