1. Properties of Water – Day 2
Kline
Biology

2. Think of some examples of things that can dissolve in water!
Universal Solvent
Water is referred to as the universal solvent because it can dissolve any polar substance
Think of some examples of things that can dissolve in water!

3. Polar vs. Nonpolar
Polar molecules – have a charge (Salt, Sugar, Oxygen, Carbon Dioxide)
Nonpolar molecules – do not have a charge (Oils, Fats, Steroids, Wax, Cholesterol)

4. Mix it up!
Solution – a mixture of substances that is the same throughout
Homogenous – same throughout
Heterogeneous – can be separated
Solvent – the substance present in greater volume (usually water)
Solute – the substance that dissolves (like salt or sugar)

5. Universal Solvent Lab

6. Bases (alkaline) – pH greater than 7 Neutral – pH of 7
Acids – pH less than 7
Bases (alkaline) – pH greater than 7
Neutral – pH of 7

7. Can you identify these substances based upon the pH?

8. States of Water

9. States of Water
Solid – water molecules are evenly spaced apart making them less dense than water.
Liquid – water molecules are densely compacted within a container
Gas – water vapor molecules are free flowing in the atmosphere

10. Freezing Properties Ice is less dense than water, therefore it floats
Water is the only substance that gets bigger when it freezes.
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11. How is this important to living things?
Ice over a pond or lake
Glaciers floating
Discuss how these examples are important in terms of water’s freezing properties with your partner.