1. Properties of Water

3. Is H2O
Mixture
Compound
Molecule
All of the above

4. H2O A chemical compound that is a molecule, so the bond is _______.
That means the bond is ________.

5. some basic science
Mixture – a material composed of 2 or more elements or compounds that are physically mixed together but not chemically combined.
Salt and pepper
Cinnamon and sugar

6. Two Types of Mixtures Suspension Solution
All the components of a solution are evenly distributed throughout the solution.
Saltwater is a solution:
Salt is the SOLUTE that is dissolved in the SOLVENT (water).
Suspension
A mixture of water and a non-dissolved material.
Material in your blood, such as cells and undissolved compounds, are an example of suspension.

7. Water Makes up ~70%+ of Earth’s surface ~60 - 70% of your mass
Exists on surface of Earth in all 3 physical states
Solid form less dense than liquid form
The properties of water make it a unique and very important compound for life to exist on our planet

9. The Water Molecule Water is POLAR
Polar – There is a negative “pole” and a positive “pole”.
This makes water “stick” to itself.
Creates 2 types of attractions:
Cohesion
Adhesion

10. Water is Polar
Water is POLAR because there an uneven distribution of electrons between the 2 hydrogen and the oxygen.

11. Hydrogen Bonds Forces of attraction (not chemical bonds)
involving hydrogen
Occurs between molecules or within a molecule

12. Cohesion/Adhesion
Cohesion – an attraction between molecules of the same substance.
Adhesion – an attraction between molecules of different substances.

13. Acids, Bases and pH

14. Acids and Bases
Acid solutions contain higher concentrations of H+ ions than pure water and have pH values below 7.
Bases, or alkaline, solutions contain higher concentrations of OH- ions then pure water and have pH levels above 7.

15. pH Scale
Ranges from 0 – 14
At pH 7 : the concentrations of H+ ions is equal to OH- ions. Water has a
pH of 7.
The lower the number the more acidic the solution.
The higher the number the more basic the solution.

16. Never underestimate the power of WATER!!