Answer:
H2O molecules, H+ ions, and OH- ions.
Step-by-step explanation:
- The chemical formula of water is H2O, thus it is, made up of two atoms hydrogen and oxygen.
- Based on this chemical formula it can be inferred that in pure water there should be only two kinds of ions present - hydrogen and hydroxide ions i.e H+ and OH-.
- Therefore, the chemist hired by the pharmaceutical company to analyze the purity of water for drug preparations should only find water molecules i.e H20 molecules in his analysis and H+ ions, and OH- ions.