Physical Properties
What is a physical property
Describes a characteristic of a substance that can be observed or measured.
Is the viscosity of pancake syrup high, medium, or low compared to water?
High
What is a chemical property?
The ability of a substance to change into a new substance or substances.
What is a Qualitative Physical Property:
A characteristic of a substance that can be described but not measured.
What is adhesion?
Property of sticking to other substances
What is the physical property of aluminum foil?
Malleability
True or false
Combustibility is the ability of a substance to react quickly with oxygen to produce heat and light.
TRUE
True or false:
Table salt dissolving in water is a physical change
False, it is a chemical change because it is changing its properties
What is cohesion?
Properties sticking together.
True or false
Copper wire is an example of Ductility
True
From the following list, indicate which items would make good conductors.
a) copper b) tire c) iron d) wool
a
Is ice melting a physical change or a chemical change
Physical because it changes its physical form, not its chemical properties.
List 3 examples of physical properties
Colour, Lustre, Hardness, Conductivity, Density, Ductility, Malleability, Viscosity
What is density
The amount of mass in a given volume of a substance
List three examples of chemical properties.
Absorbs heat during reaction
Combustible
Forms gas when heated
Reacts with acid
Reacts with water
Emits heat during reaction
Emits light during reaction
Forms a precipitate (solid) in a solution
What is the difference between a physical and chemical change?
Physical: A change in size, shape, or state. No new substance is formed
Chemical: A change in the physical and chemical properties. A new substance is formed
Why does ice float and not sink?
Water expands when it freezes.
Water as a solid (Ice) is less dense than water as a liquid.
Colour and Lustre
Is chemical property a qualitative or quantitative data, and give an example
Qualitative
Examples: Colour, Odour, Temperature, Production of Light, Formation of a new solid inside a liquid, or the Production of a new gas.
Use the examples water and salt to help explain the difference between solute and solvent.
In a solution like salt water, salt is the solute because it dissolves, and water is the solvent because it does the dissolving.