During an analytical procedure to determine the concentration of a standard hydrochloric acid (HCl\text{HCl}HCl) solution, a technician cleanses a volumetric pipette using demineralised water.
Before transferring a 25.0 cm325.0\text{ cm}^325.0 cm3 aliquot of the hydrochloric acid to the titration flask, the technician rinses the internal surfaces of the pipette with a small volume of the hydrochloric acid solution.
Explain why rinsing the pipette with the hydrochloric acid solution is a necessary step to ensure an accurate titration.
276 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.