What makes a compound an acid?

Question

a
It dissolves into Hydrogen ions in water (H+ and H3O+)
b
It has a pH higher than 7
c
It dissolves into Hydroxide ions in water (OH-)
d
It cannot be mixed with oil

Answer 1

The correct answer is:

a It dissolves into Hydrogen ions in water (H+ and H3O+)

Acids are defined by their ability to donate protons (H+) or produce Hydrogen ions (H+) when dissolved in water, which can also lead to the formation of hydronium ions (H3O+). The other options do not accurately describe the characteristics of acids.