Properties of Water

Our body, The Bodies of organisms, The physical environment

Chemicals are the things that make up:

35 Days

Every _______ your skin replaces itself.

1 month

Every ________ your liver replaces itself.

Water

Life’s chemistry is tied to ________.

Water

Life first evolved in _______.

Water

All living things require _________.

70-95%

The chemical reactions of our body occur in cells consisting of _________ water.

Polarity

The oxygen slightly negative charge, and hydrogen slightly positive charge.

Dipole

An oxygen atom has a much stronger attraction for electrons than a hydrogen atom with its single proton.

Molecular Interactions

Hydrogen Bonding and Dipole-dipole Interaction

Hydrogen Bonding

The force of attraction between a hydrogen molecule with a partial positive charge and another atom or molecule with a partial or full negative charge.

Hydrogen Bonds

Are not as strong as covalent or ionic bonds, and they can form in other compounds besides water.

Multiple Hydrogen Bonds

Water is able to form multiple hydrogen bonds that accounts for many of its special properties.

Adhesion

Holds water molecules to other polar substances

Surface Tension

Is caused by cohesion of water to itself and lack of adhesion to air.

Specific Heat

Water has an extremely high ________ (amount of energy needed to raise the temperature)

Heat Capacity (Heat storage)

Energy is stored in hydrogen bonds and molecular motion, water moderates temperature.

Heat

Is the total kinetic energy stored in an object (Related to mass)

Temperature

Is the average kinetic energy (mass doesn’t matter)

Water

Dissolves huge range of compounds (Universal solvent) due to its molecular interactions.

Solution

Evenly distributed mixture of 2 or more substances

Solvent

Dissolving substance (Usually water)

Solute

Dissolved substance

Hydrophobic substances

Do not form hydrogen bonds with water (oils, membranes, some proteins)

Hydrophilic substances

Form hydrogen bonds with water (ions, sugars, cellulose, some proteins)

Homogeneous

Hydrophilic

Heterogeneous

Hydrophobic

Polarity of Water

Is due to the more electronegative oxygen and less electronegative hydrogen.

Cohesion

Holds water together, and droplets of water

Heat Capacity

Is the property of water that makes it capable of regulating body temperature.

Specific Heat

It is the amount of heat required to increase the temperature of 1g of any substance 1*C