Chemical And Physical Properties and Changes

Matter

Something with mass and takes up space.

Physical Properties

• Characteristic of a substance that does not involve the formation of a new substance

• Physical apperance and composition

• Qualitative or quantitative

Colour

• Physical Property

• Appearance of an object based on wave lengths being reflected

Clarity

• Physical Property

• Ability of light to pass through a substance

• transparent, translucent or opaque

Lustre

• Physical Property

• The level of reflection or the shininess of an object.

Malleability

• Physical Property

• Ability to be hammered or rolled into shape without breaking apart.

Ductility

• Physical Property

• Ability to be stretched, pulled or drawn into a thin wire without breaking.

Texture

• Physical Property

• The feel or shape of a surface or substance

• smooth or rough

Viscosity

• Physical Property

• The flow of a liquid and its resistance

• High viscosity(thick&less flow) or Low viscosity(runny&more flow)

Solubility

• Physical Property

• The ability of a substance to dissolve in a liquid

• Soluble(dissolves) or insoluble(doesn’t dissolve)

Conductivity

• Physical Property

• The ability of a substance to conduct heat or electricity.

Odour

• Physical Property

• A property of a substance that someone can experience with the sense of smell.

States of Matter

• Physical Property

• Can either be in the form of a solid, liquid or a gas.

Boiling & Condensation Point

• Physical Property

• Tem of boiling or condensation, usually the same

Melting & Freezing Point

• Physical Property

• Temp of melting or freezing, usually the same

Shape

• Physical Property

• apperance or shape a substance takes on

• Eg. salt is crystallune and slime is amorphous

Qualitative Physical Properties

• descriptive data based on observations

• 5 senses

Quantitative Physical Properties

• numerical data

• counting & measurable

Chemical Properties

• The properties and abilities of a substance when it changes into a new substance(s) during a chemical reaction.

• How a substance behaves with others

Combustibility

• Chemical Property

• Being capable of igniting into a flame, burning and producing heat/light

• requires a vigorous ignition source

Reaction with Acid

• Chemical Property

• The ability of a substance to react with acid.

Flammable

• Chemical Property

• being able to easily catch fire under minimal ignition (spark)

Reaction with light

• Chemical Property

• ability of a substance to react with light

• e.g hydrogen peroxide converted to water

Physical Change

A change that does not result in the formation of a new substance.

Chemical Change

A change a substance undergoes which results in the formation of a new substance.

Signs of Chemical Change

1. Colour Change

2. Formation of precipitate

3. Heat or light is produced

4. Gas formation (bubbles observed from new gas)

5. Generally difficult to reverse.