Question

According to Arrhenius, an acid gives :
a.) ${H^ + }$ in water
b.) $O{H^ - }$ in water
c.) Both (A) and (B)
d.) $O{H^ - }$ in acid medium

Answer 1

Hint: Acids and bases can be defined on the basis of various concepts, such as Arrhenius, Bronsted Lowry and Lewis etc. According to the Arrhenius concept, an acid is a substance that can donate protons in aqueous solution.

Complete answer:
As we all study the different definitions of acids and bases on various concepts, such as Arrhenius, Bronsted Lowry and Lewis etc. Of all these, the Arrhenius concept of the acid-base is the oldest. According to Arrhenius' concept, an acid is the substance that can donate protons in aqueous solution means it can donate ${H^ + }$ ions in the water while the base is the substance capable of donating hydroxyl ions. In other words, it can be defined as the substance which when added to water, it increases the concentration of protons in the solution. HCl is an example of Arrhenius acid. It can donate protons in water.

So, the option a is the correct answer.

Note: It must be noted that the Arrhenius acid-base concept is very restricted because it requires the molecules to have protons and hydroxyl ions to dissolve in water but this is not the case in all situations. So, other concepts came into use. The most common use did the Lewis acid-base concept. According to the Lewis concept, an acid can accept electrons while the base can donate electrons.