Mr. Sheehan’s Pd
Name
Ac Bio Chp 2.2 Review WS
1.
Water is polar. What does that mean?
Draw a water molecule showing where the positive and negative charges are.
2. Water forms ______________________ bonds between a hydrogen atom on one molecule
and the _______________________ atom of ______________________ molecule.
3. Define cohesion and adhesion. Give an example of each.
4. The amount of energy required to raise the temperature of a substance is its ________ _____________.
5. A. Define mixture.
B. What is the difference between a compound and a mixture? Give an example of each.
6. What is the difference between a solution and a suspension? Give an example of each.
7. I pour chocolate syrup into my milk. What is the solvent and what is the solute?
8. __________________ is the universal solvent.
   FLIP TO THE BACK
   FLIP TO THE BACK   
Name
Mr. Sheehan’s Pd
9. The pH scale measures the concentration of ___________ ions.
10. Draw a pH scale. Indicate the following:
A. Number range
2. Neutral
III. Labeled arrow showing increasing acidity and another arrow for increasing basicity.
11. Acids form _________ ions. Bases form _________ ions.
12. ___________________ - a weak acid or base that can react with strong acids or bases to prevent
changes in pH.
13. If I have a strong acid (pH = 2), I would use a base buffer with a pH of ________.
14. Why are buffers important to organisms?