Describe how to prepare 1.00 L of 0.646 M HCl solution, starting with a 2.00 M HCl solution.
Strategy:
Because the concentration of the final solution is less than that of the original one, this is a dilution process. Keep in mind that in dilution, the concentration of the solution decreases but the number of moles of the solute remains the same.
Solve for the volume in (mL) of 2.00 M HCl needed to prepare 1.00 L of a 0.646 M HCl solution.
Note: Answers must be numeric, not alphanumeric—42, not forty-two.