Question

Using the Arrhenius concept of acids and bases, identify the Arrhenius acid and base in each of the following reactions: 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l) NH3(g)+HCl(g)→NH4Cl(s) Drag the appropriate items to their respective bins.

Answer 1

(1)
`KOH` is act as a base and
`H_2SO_4` act as an acid.

(2) We can not classified as a base or an acid.

Explanation :

According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions
`(OH^-)` when dissolved in water and an acid is defined as a substance which donates hydronium ions
`(H_3O^+)` in water.

(1) The given chemical reaction is:

`2KOH(aq)+H_2SO_4(aq)\rightarrow K_2SO_4(aq)+2H_2O(l)`

In this reaction,
`KOH` produces
`OH^-` ions and
`H_2SO_4` produces
`H^+` ions.

Thus,
`KOH` is act as a base and
`H_2SO_4` act as an acid.

(2) The given chemical reaction is:

`NH_3(g)+HCl(g)\rightarrow NH_4Cl(s)`

Arrhenius concept is only applicable on aqueous solution. Thus, we can not classified as a base or an acid.