| Properties of Water |  |
Pre-Lab Questions:
1. Explain why water is referred to as the universal solvent.
2. What is the overall charge on a molecule of water?
3. Water is a polar molecule (appears to have a charge). Explain why this is so.
4. Which end of a water molecule “acts negative”? Which “acts positive”?
5. Is water the only molecule that is polar?
6. Explain what occurs whenever several water molecules are near each other in a droplet. Include a sketch of this.
7. The property of water molecules being attracted to other water molecules is called ________________.
8. Explain what causes water to have surface tension.
9. Surface tension causes causes water to _____________ on surfaces such as glass.
10. In order to clean a surface, what must happen to surface tension? What type of chemicals can do this? Give an example
11. Besides reducing surface tension, what 4 other things can surfactants perform?