Question

Find out the concentration of 0.2 M solution of
Na2Co3, in g/L.​

Answer 1

Answer:

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Answer 2

Complete question:

The molarity of a 0.2 N Na₂CO₃ solution will be:

A. 0.05 M

B. 0.2 M

C. 0.1 M

D. 0.4 M

Answer:

The concentration of 0.2 N solution of  Na₂CO₃ is C. 0.1 M.

Explanation:

The n-factor is defined as number of electrons lost or gained from one mole of salt.

In Na₂CO₃, there are 2 electrons exchange. Thus, the n-factor of Na₂CO₃ is 2

Normality = n-factor × Molarity

Molarity is defined as number of moles of solute per liter of solution.

Molarity = Normality/n-factor

On substituting the values, we get,

Molarity = 0.2/2

∴ Molarity = 0.1 M