Question

Sea water contains 53ppm of Na2CO3. Find mass of Na2CO3 in glass water?

Answer 1

Number of moles of Na

2

CO

3

=

106

25.3

=0.239 moles

Molarity of solution=

0.25

0.239

=0.956mol/litre

Na

2

CO

3

⟶2Na

+

+CO

3

2−

∴ Concentration of CO

3

2−

=0.956M

Concentration of Na

+

=2×0.956=1.912M