Question

Which compound is an Arrhenius base?
(1) CO2 (2) CaSO4 (3) Ca(OH)2 (4) C2H5OH

Answer 1

Ca(OH)2, the compound is an Arrhenius base.

Answer: (3) Ca(OH)2

Answer 2

Answer: Option (3) is the correct answer.

Step-by-step explanation:

Arrhenius base are defined as the species which dissociate to give hydroxide or
`OH^(-)` ions.

For example, when
`Ca(OH)_(2)` is dissolved in water then it dissociates into
`Ca^(2+)` and
`OH^(-)` ions.

Whereas
`CO_(2)`,
`CaSO_(4)`, and
`C_(2)H_(5)OH` does not dissociate to give hydroxide ions.

Thus, we can conclude that
`Ca(OH)_(2)` compound is an Arrhenius base.