Friday, September 20, 2013

9/20/13

1.  Why is pH important to living organisms: poster presentations

H.W. Due Monday: 2.1-2.2 Review Questions (see below) to help you prepare for Monday's 2.1-2.2 Quiz
2.1-2.2 Chemistry, Water and pH Review Questions:
Answer these questions in complete sentences on a separate sheet of paper to help you prepare for Monday’s quiz.  This is due on Monday.
2.1 The Nature of Matter
1.  What three subatomic particles make up atoms?
                a. Describe at least three properties of each of these subatomic particles
2.  What is an isotope?
a.  How are all of the isotopes of an element similar?
b.  Give an example of an isotope.
3.  Distinguish between an element and a compound.
a. In what ways do compounds differ from their component elements?
4.  Identify and describe the main types of chemical bonds.
2.2 Properties of Water
1.  Describe the structure of water.
                a.  How does the structure of water contribute to its unique properties?
2.  Define polarity and draw a picture of how water is a polar molecule.
                a.  How does water’s polarity influence its properties as a solvent?
3. Define neutral (use H+ and OH- in your definition).
                a.  What is the pH of a neutral solution? 
4. Define acid (use H+ and OH- in your definition). 
a. What is the pH range for acidic substances? 
b. What are two properties of acids?
c. Name two common/household acids.
5.  Define base (use H+ and OH- in your definition). 
a. What is the pH range for basic/alkaline substances? 
b. What are two properties of bases? 
c. Name two common/household bases
6.  Why is pH important to living organism?