1. what is polar molecule? Why is water considered polar?
2. Explain hydrogen bonding. How many hydrogen bonds can a single water molecule form?
3. Distinguish between cohesion and adhesion
4. What is demonstrated when you see beads of water on a waxed car hood?
5. Which property explains the ability of a water strider to walk on water?
6. The calorie is a unit of heat. Define calorie.
7. Water has a high specific heat. What does this mean? How does water's specific heat compare to alcohol's?
8. Explain how hydrogen bonding contributes to water's high specific heat.
9.Summarize how water's high specific heat contributes to the moderation of temperature. How is this property important to life?
10. Define evaporation. What is heat of vaporization? Explain at least three effects of this property on living organisms.
11 Ice floats! So what? Consider what would happen if ponds and other bodies of water accumulated ice at the bottom. Describe why this property of water is imporant.
12. Now, explain why ice floats. Why is 4 degree Celsius the critical temperature in this story?
13. explain why water is such a fine solvent.
14. Define hydrophobic and hydrophilic.
15. You already know that some materials such as olive oil will not dissolve in water. In fact oil will float on top of water. Explain this property in terms of hydrogen bonding.
16. Can you prepare 1 liter of a 0.5 molar glucose solution? Show work.
17. Define molarity
18. What two ions form when water dissociates?
19. What is the concentration of each ion in pure water at 25 degree Celsius?
20. Water has a pH of 7. pH is defined as the negative log of the hydrogen ion concentration of [H+] Can you now see how water is assigned a pH of 7?
21 To go a step further the product of H+ and OH- concentrations is a constant 10 (small -14 at the top right of the 10) [H+} [OH-} =10 (small -14 at top right of 10)
22. Acid precipitation is increasing. Explain its sources.
22. Discuss how CO2 emissions affect marine life and ecosystems.
Please and thank you!
Quick Reply
