Biology - Properties of Water
Acid
A compound that forms hydrogen ions (H+) in solution
Base
A compound that forms hydroxide (OH-) ions in solution
Heat Capacity
The amount of energy needed to increase the temperature of a substance
specific heat
The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celcius
Hydrogen bond
The attraction between a hydrogen atom (with a partial positive charge) and another atom with a partial negative charge
H2O
The chemical formula for water
surface tension is a measure of what?
how hard it is to break the surface of a liquid
What keeps particles suspended?
water
pure water has a ph of
7
at sea level water freezes at
0 degrees celcius
Five properties of water
1.)Cohesion and Adhesion 2.)Surface tension 3.)High specific heat 4.)Density 5.)Universal Solvent
at sea level water boils at
100°C
Mixture
A material composed of two or more elements or compounds that are physically mixed together but are not chemically combined
Surface tension
A measure of how difficult it is to break the surface of a liquid and is caused by cohesion
pH scale
A measurement system that indicates the concentration of hydrogen ions (H+) in a solution
Suspension
A mixture of water and nondissolved material
Solution
A mixture where the components are evenly distributed throughout
Polar molecule
A molecule in which the positive and negative charges are unevenly distributed
Cohesion
A property of water in which the water moecules are attracted to one another
Adhesion
A property of water in which the water molecules are attracted to a substance other than water
Buffer
A weak acid or base that can react with a strong acid or base to prevent sudden changes in pH
Capillary action
The movement of a liquid along a surface and against the force of gravity and is due to both adhesion and cohesion
Solvent
The substance in which the solute dissolves
Solute
The substance that is dissolved in a solution