Properties of Water
Learning Objectives Discuss the unique properties of water. Differentiate between solutions and suspensions. Explain what acidic solutions and basic solutions are.
The Water Molecule Water molecules are polar; the charges are unevenly distributed in the molecule. (-) (+)
Hydrogen Bonding Hydrogen bond
Cohesion Cohesion: attraction between molecules of the same substance
Adhesion and Heat Capacity Adhesion: attraction between molecules of different substances Heat capacity: amount of heat it takes to raise temperature Meniscus
Solutions and Suspensions Water’s polarity gives it the ability to dissolve both ionic compounds and other polar molecules.
Acids, Bases, and pH Low pH = acidic; higher concentration of H + High pH = basic; lower concentration of H + Pure water Human blood Stomach acid
Buffers Buffers help maintain homeostasis in organisms. Base Neutral Acid Unbuffered base + acid = _________ Buffered base + acid = ________ acidic pH basic pH
Student Worksheet Answers