Classes for Period 1 and 6 classes finished their lab and have homework.  Answer Analysis Questions 1-4 on p. E-51 of the book on a separate piece of paper. 

The questions are shown below (with some revisions)

Water As a Solvent

Name ____________________ Date _____________________ Period ____________________

1.     1. A liquid that dissolves solids is called a solvent.  In this activity:

a.     What are the solvents?

b.     In which solvent did the solids dissolve the best or most?

                                                                                           

2.     2. All water on Earth contains some dissolved materials, usually salts. Ocean water is about 3.5% salt.  Salt that we use on our food is a chemical compound called sodium chloride.  Sodium chloride is the most common salt dissolved in ocean water.

Calcium chloride is also found on the Earth’s surface.  Would you expect to find calcium chloride in ocean water? Explain.

3.     3. Water is sometimes called the universal solvent.  Explain what you think this statement means. Support your answer with evidence from the activity.

4.     4. Do you think that most of the water on Earth is salt water or freshwater?  Why?

     

     This homework will be due tomorrow. I will collect it from my homeroom students before 1st period out by your lockers.  I will collect it from 6th period students when able, either tomorrow or Thursday; you are welcome to bring it to me tomorrow.     

     Also, please check out my Donors Choose link!  Thanks! Mr. G