Chapter 2.3 Chemistry of Water Flashcards
Water is a …………… molecule
Water is a polar molecule
How do water molecules cling together?
They cling together through hydrogen bonds. However the molecule itself is joined together by covalent bonds.
What are the properties of water?
- Water has a high heat capacity
- Water has a high level of vaporization
- Water is a solvent
- Water molecules are cohesive and adhesive.
- Water has a high surface tension.
Ice is less dense than liquid water.
What is cohesion?
Cohesion is when molecules are attracted to similar molecules therefore they cling together.
What is adhesion?
Adhesion is when molecules are attracted to the surface.
Acids release ………..ions in water
Acids release hydrogen ions in water
Bases take up…….ions or release…….ions
Bases take up hydrogen ions or release hydrogen ions.
What does pH stand for?
pH stands for power of hydrogens
What are buffers?
Buffers are substances that help keep the pH of a solution within a specific limit.
Give an example of a buffer in the human body.
Human blood contains a combination of carbonic acid and bicarbonate ions that acts as a buffer to maintain the pH of 7.4
What happens when pH of blood drops to 7?
Acidosis results
What happens when pH of blood rises above 7?
Alkalosis results
How are buffersimportant in the body?
They help to maintain homeostasis- our body works hard to keep things in the right balance.
