A chemist wishes to precisely calculate the concentration of an analytical standard solution of sodium hydroxide which they are preparing

Question

A chemist wishes to precisely calculate the concentration of an analytical standard solution of sodium hydroxide which they are preparing, so that it can be used in later experiments. To prepare 1.000 L of the solution at a desired concentration of 1.000 mol/L, the chemist uses an analytical balance to weigh 39.997 g of NaOH and adds it to a 1 L beaker which has been filled with distilled water to the 1 L mark. Explain what error the chemist has made in their procedure, how it might impact their desired result, and suggest one change that would improve their procedure (different method, different equipment, etc.).

Answer 1

Wrong. volume of one liter beaker is not precise.

preparation must be done in one liter volumetric flask where the total volume will be precisely one liter, after dissolution of solute in less than one liter and addition of water to the 1L reference mark.