Question

200.0 mL of a 0.600 M solution of KCl is diluted to 600.0 mL. What is

Answer 1

Answer:

0.200 M

Explanation:

Begin by finding how many moles of KCl there are by using the molarity and given volume:

$\frac{0.600 mol}{1000 mL} x \frac{200.0 mL}{1} = 0.12 mol KCl$

(Remember that molarity is mol/L, which is equal to mol/1000 mL.)

Next, divide the moles of KCl by the new volume (after dilution):

$\frac{0.12 mol KCl}{600.0 mL} x \frac{1000 mL}{1 L} = \frac{0.200 mol KCl}{1 L} = 0.200 M$

The new concentration is 0.200 M.