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

Answer:

6.9 ml of concentrate

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