Question

1g of dibasic acid is completely neutralised with 100ml of 0.5N NaOH solution. What is the molar mass of acid?
A.20
B.30
C.40
D.50

Answer 1

Hint: A chemical reaction in which an acid and a base react quantitatively with each other is known as neutralisation or neutralisation. In a water reaction, neutralisation ensures that there are no excess hydrogen or hydroxide ions in the solution.

Complete answer:
Dibasic acids are acids that give off two hydrogen ions (\[{H^ + }\]) per molecule of water. Sulphuric acid, carbonic acid, and oxalic acid, for example.
What is Neutralization, and how does it work?
An acid reacts with a base to produce salt and water in an acid-base reaction. The acid intensity of the reactants and their proportions determine the pH of the neutralised solution. The neutralisation reaction can be defined as follows:
${\text{ Acid + Base }} \to {\text{ Salt + Water }}$
Normality is defined as the amount of grams or mole equivalents of solute found in one litre of a solution, according to the conventional definition. The number of moles of reactive units in a complex is what we mean when we say identical.
Hence It is calculated that
${\text{ Moles }} = N \times \dfrac{V}{{1000}}$
N = Normality (0.5 N)
V = Volume (100 ml)
${\text{ Moles }} = 0.5 \times \dfrac{{100}}{{1000}}$
Hence,
The number of moles = 0.05
Here In nature, acid is dibasic.
One mole neutralises two moles of NaOH.
To neutralise 0.05 moles of NaOH, the number of moles of acid needed is $ = \dfrac{1}{2} \times 0.05 = 0.025$
The mass of a sample of a chemical compound divided by the volume of material in that sample, estimated in moles, is the molar mass of that compound in chemistry. In grams, that is the mass of 1 mole of the material, or \[6.022 \times {10^{23}}\]particles.
Molar mass $ = \dfrac{1}{{0.025}} = 40$
Molar mass of Acid is 40.

Note:
Characteristic properties of aqueous Arrhenius acids provide a practical definition of an acid. Acids produce sour aqueous solutions, can make blue litmus red, and form salts as they react with bases and some metals. Although the strict meaning applies only to the solute, an aqueous solution of an acid with a pH less than 7 is often referred to as "acid." A lower pH indicates that the solution is more acidic, resulting in a greater concentration of positive hydrogen ions in the solution. Acidic chemicals or compounds are those that have the property of an acid.