Question

A 2.0 L solution contains 2.0 moles of BaCl₂. What is the chloride ion concentration?

a) 0.25 M
b) 0.50 M
c) 0.67 M
d) 1.0 M
e) 2.0 M

Answer 1

The chloride ion concentration is 2.0 M

Step-by-step explanation:

To calculate the chloride ion concentration, we need to consider that each mole of barium chloride dissociates into two moles of chloride ions. In this case, we have 2.0 moles of BaCl₂, so we will have 4.0 moles of chloride ions. To find the concentration, we divide the number of moles by the volume of the solution:

Concentration = Number of moles / Volume of solution

Concentration = 4.0 moles / 2.0 L = 2.0 M