Question

0.20 mol sample of MgCl2(s) and a 0.10 mol sample of KCl(s) are dissolved in water and diluted to 500 mL. What is the concentration of CI in the solution?

0.15 M

0.30 M

0.50 M

0.60 M

1.0 M

Answer 1

Answer:

Moles of chloride ions by potassium chloride = 0.10 moles

Total moles = 0.40 + 0.10 moles = 0.50 moles

Given, Volume = 500 mL = 0.5 L (1 mL = 10⁻³ L)

Concentration of chloride ions is:

Molarity=Moles of solute/Volume of the solution

=0.50/0.5=1M