Question

Which is a property of acids in aqueous solutions? They feel soapy. They taste bitter. They increase the concentration of H+ ions. They decrease the concentration of H+ ions.

Answer 1

They increase the concentration of H⁺ ions.

Step-by-step explanation:

By the Arrhenius theory of acid-base, an acid is a substance that, in water, dissociates releasing H⁺ ions and an anion, and a base is a substance that, in water, dissociates releasing OH⁻ ions and a cation.

In aqueous solutions, the acids increase the concentration of H⁺ ions, and they generally have a sour taste. The bases decrease the concentration of H⁺ ions (because it reacts with OH⁻ ions to form water) and feel soapy.

Answer 2

Answer: Option (c) is the correct answer.

Step-by-step explanation:

According to Bronsted-Lowry, acids are the species that dissociate to give hydrogen ion or
`H^(+)` ions.

For example,
`HCl \rightleftharpoons H^(+) + Cl^(-)` this shows that HCl is an acid as it gives hydrogen ions upon dissociation.

When dissolved in water HCl dissociates into ions as follows.

`HCl + H_(2)O\rightleftharpoons H_(3)O^(+) + Cl^(-)`

Thus, we can conclude that a property of acids in aqueous solutions is that they increase the concentration of
`H^+` ions.