Kemtec Science: Physical & Chemical Resources of the Living Ocean

• Target Grades: 9-12
• Number of Students: 24 students work in six groups of four

This kit is designed to examine salt, not only as the most obvious property of seawater, but also as one of its most valuable chemical resources. Students learn about the varying salt concentrations of seawater and its amazingly uniform composition. They also learn how salt can be removed from seawater. Experiments include: determining salinity by evaporation, determining salinity using a hydrometer, desalination by freezing, and desalination using a solar still. Allow five class periods.

Kit Contains:

• Instructor Manual with Reproducible Student Data Sheets
  
• Empty Bottles w/ Caps
  
• Graduated Cylinders
  
• Fine Sand
  
• Sea Salt
  
• Pipets
  
• Petri Dishes
  
• Clay
  
• Hydrometer

Required, But Not Included:

• Refrigerator or Freezer
  
• Hot Plate
  
• Balance (x .01g)
  
• Chloride/Salinity Test Kit
  
• Laboratory Glassware