Question

You need to create a set of standard dilutions from a stock solution that has a a concentration of 0.750 M. You begin by taking 2.00 mL of stock solution and adding 8.00 mL of water for your first dilution. What is the concentration of the resulting solution?

Answer 1

The concentration of the resulting solution is 0.15 M.

Step-by-step explanation:

Stock solution

0.750 mol ___________ 1000 mL

x ___________ 2.00 mL

x = 1.5 x 10⁻³ mol

Resulting solution:

1.5 x 10⁻³ mol _________ 10.00 mL

y _________ 1000.00 mL

y = 0.15 mol

The concentration of the resulting solution is 0.15 M.