12.1 Experimental design
Click on any question below to reveal the interactive flashcard answer key:
1. Name the appropriate apparatus used for the measurement of time.
Digital or analog stop-watches.
2. What apparatus should be used for measuring temperature in an experiment?
Liquid-in-glass, digital thermometers, or temperature probes.
3. Name the specific apparatus used for the measurement of mass.
Electronic analytical balances.
4. List the four types of apparatus mentioned in the syllabus for the measurement of volume.
Burettes, volumetric pipettes, measuring cylinders, and gas syringes.
5. What should a researcher do when selecting experimental methods and apparatus?
Propose and critically analyze the comparative advantages and disadvantages of different experimental arrangements and measurement tools based on precision and safety.
6. Define a solvent.
A substance (usually a liquid) that is capable of dissolving a targeted solute.
7. Define a solute.
A substance that undergoes dissolution inside a chosen solvent.
8. What is a solution?
A homogeneous molecular mixture composed of one or more solutes completely dissolved within a solvent.
9. Define a saturated solution.
A solution containing the maximum possible concentration of dissolved solute in the solvent at a specified, constant temperature.
10. What is a residue?
The solid matter that remains collected on filter medium or inside a vessel following evaporation, distillation, filtration, or a similar separation procedure.
11. Define the term filtrate.
The liquid phase or solution clear of solid chunks that passes cleanly through the porous matrix of a filter.