Answer

Verified

418.2k+ views

**Hint:**If we know the normality of a solution then we can convert it into normality by dividing normality by the number of hydrogen ions in acid or base.

**Complete step by step answer:**

Molarity is defined as the number of moles of solute present in one litre of solution. Normality is defined as the number of molecules equivalent to solute in litre of the solution.

Normality is calculated using the formula

Normality = $\dfrac{\text{gram equivalent weight}}{\text{litre of solution}}$

And formulae for molarity is

Molarity= $\dfrac{\text{moles of solute}}{\text{litre of solution}}$

To convert normality to molarity or molarity to normality we have to find the n factor which is the number of hydrogen ions in acid or base.

But in this question sodium carbonate is a salt and to find the n factor of a salt we have to calculate the number of moles of electrons exchanged either it is loosed or gained by the one mole of the given salt which is sodium carbonate.

There is an exchange of two electrons in sodium carbonate hence the n factor of sodium carbonate is 2.

Given in the question

Normality of sodium carbonate = 0.2 N

The formulae that defines the relation between normality and molarity is normality is equal to the product of n factor and molarity.

But here normality is given to molarity will be equal to the ration of normality to n factor

Molarity = \[\dfrac{\text{normality}}{\text{n factor}}=\dfrac{0.2}{2}\]

Molarity = 0.1 M

**So, the correct answer is “Option C”.**

**Note:**Pay attention while calculating n factor, there are different ways to calculate n factor for acid, base or a salt or chemical reaction. The n factor for a redox reaction is equal to the number of moles of lost or gained electrons per molecule.

Recently Updated Pages

What number is 20 of 400 class 8 maths CBSE

Which one of the following numbers is completely divisible class 8 maths CBSE

What number is 78 of 50 A 32 B 35 C 36 D 39 E 41 class 8 maths CBSE

How many integers are there between 10 and 2 and how class 8 maths CBSE

The 3 is what percent of 12 class 8 maths CBSE

Find the circumference of the circle having radius class 8 maths CBSE

Trending doubts

Which are the Top 10 Largest Countries of the World?

Fill the blanks with the suitable prepositions 1 The class 9 english CBSE

One cusec is equal to how many liters class 8 maths CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE

Give 10 examples for herbs , shrubs , climbers , creepers

The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

Change the following sentences into negative and interrogative class 10 english CBSE