Question

A chemist is preparing solutions for a 5 point calibration curve to analyze a sample. The analyst prepares a 50 mL stock solution in a beaker and immediately pours the solution into a 100 mL volumetric flask. He then dilutes it to the mark and uses it to make sequential dilutions. He then runs the calibration curve and does analysis on an unknown sample. However, in one of the previous steps, the analyst has made a mistake in preparing their calibration curves. What is the mistake? How would this mistake impact the calibration curve? How would this mistake impact analysis of the sample?

Answer 1

Firstly the stock solution should be prepare in volumetric flask not in beaker , since when analyst make the sequential dilutions then there will be concentration errors which having empact on calibration curve.