Question

Find the molarity of solution containing 21.2 grams Na2co3 in 50 ml​

Answer 1

Answer:

your ans is

Explanation:

Correct option is B)

Molecular mass of Na

2

CO

3

=106 gmol

−1

∴ Number of moles =

106

53

=0.05mol

As 0.05 mol are dissolved in 500mL;

Number of moles dissolved in 1000mL (1L) or molarity of th solution

=

500

0.05

×1000=0.1M.