Bio - Properties of Water

Six elements of life

Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur

Electronegativity

Tendency to attract electrons

Polarity

When the electrons in a covalent bond are to shared equally

Non - polarity

Equally shared electrons in a covalent bond

Cohesion

Attraction between molecules of the same substance

Adhesion

Attraction between molecules of different substances

Surface tension

Tendency of a liquid to resist rupture when placed under tension or stress, caused by cohesion

Capillary action

Upward motion of water against gravity based on the adhesion of water to the walls of a glass tube

Meniscus

Curve in the upper surface of a liquid close to the surface of the container

Mixture

A combination of two or more substances that are not chemically combined

Solution

A mixture in which a solute is dissolved in and equally distributed throughout the solvent

Solute

Substances that are dissolved into a solvent

Solvent

A substance capable of dissolving other polar molecules and ionic compounds

Suspension

Acid

Less that 7 on pH scale (acidic)

Bases

More than 7 on pH scale (alkaline)

pH

A measure of the concentration of hydrogen ions

Specific heat/heat capacity

The energy required to raise the temperature of a substance