Answer to Question #165835 in General Chemistry for Brayden

Question

When 1 mL of a 4 M solution of HCl is diluted with 14 mL of water to create a new total volume of 15 mL, the new concentration of the HCl is:

Answer 1

Molarity = moles / volume

Molarity = 4M and volume =1 ml = 0.001L

4M = moles/0.001L

moles = 0.004 moles

New volume = 15 ml = 0.015L

Moles = 0.004

New conc ( molarity) = 0.004/0.015 = 0.266M