Question

You have to prepare 100.0 mL of a 0.100 M solution of sodium carbonate. You have a concentrated solution of sodium carbonate that you can take a small amount from and transfer to a 100.0 mL volumetric flask, and then dilute accordingly. If the concentrated solution has a concentration of 1.45 M, calculate the volume that you need to transfer to the volumetric flask.

Answer 1

6.9 ml of concentrate

Step-by-step explanation:

100 ml of .1 M will require .01 moles

from a 1.45 M solution, .01 mole would be

.01 mole / ( 1.45 mole / liter) = 6.9 ml of the concentrate then dilute to 100 ml