Answer to Question #111991 in General Chemistry for Vanetta Green

Question

What volume in milliliter of 2.00 M calcium chloride stock solution would you use to make 500 mL of 0.300 M calcium chloride solution?

Answer 1

C₁ = 2.00 M

V₁ = unknown;

C₂ = 0.300 M

V₂ = 500 mL

Solution:

Let's use the following expression when making diluted solutions from more concentrated solutions.

C₁V₁ = C₂V₂

Let's substitute the values and solve for V₁:

V₁ = C₂V₂ / C₁

V₁ = (0.300 M × 500 mL) / (2.00 M) = 75 mL

V₁ = 75 mL

Answer: 75 mL of 2.00 M calcium chloride stock solution should be taken.