Physical/Chemical Properties
Ice melting. Physical or chemical?
physical. bonus points (+50) for qualitative or quantitative.
Name two safety rules that you must follow in the lab
-no eating
-no horseplay
-wash hands
-clean up properly
-no clutter in your workspace
-wear proper safety equipment
-don't eat your experiment
-don't mix chemicals unless told by teacher
-follow instructions
How particles behave, particularly when their spacing and movement changes is the definition of what theory?
Kinetic Molecular Theory
What are the 4 states of matter
Solid, liquid, gas and plasma
True or false. Volume is the amount of space a substance takes up.
A lion statue turning brown/red because of rust. Is this a chemical or physical property.
Chemical
Combustibility is an example of chemical or physical property?
Chemical property
Name 3 of the 4 concepts that make up the kinetic molecular theory
1.All matter is made up of very small particles
2. The particles exist in empty space
3. Particles are constantly moving
4. Energy (heat and kinetic energy) makes particles move. The more energy the particles have, the faster they can move and the farther apart they can get.
What is the point at which a solid becomes a liquid? Eg. Melting point, boiling point, dew point, or freezing point.
Melting point
If a piece of wood has a mass of 1500g and a volume of 2000cm3, what is its' density?
.75g/cm3
I observed that the liquid is purple. Is this qualitative or quantitative?
Qualitative
The vapour in the clouds is turning into rain. What is this process called?
Condensation
Which state of matter has the greatest amount of kinetic energy?
Gas or plasma
Describe the behaviour of liquid in terms of its volume and shape.
It has a constant volume and it takes the shape of its surroundings.
Water has a density of 1g/ml. What density would an object need to have to float on top of water?
anything less than 1g/ml
An example of a mixture is carbon monoxide gas coming out of a cars exhaust pipe. True or false.
False. This is an example of a compound, a chemical reaction has produced carbon monoxide. You cannot separate carbon monoxide unless it is with a chemical reaction. An example of a mixture would be trail mix, something you can separate physically.
Conservation of Mass. Fill in the blank: The mass of the reactants is _____ to the mass of the products.
the mass of the reactants is equal to the mass of the products
Why is it easier to run your hand through liquid then a solid?
There is more empty spaces in the liquid then in the solid.
Describe the behaviour of solids in terms of particle spacing and movement.
close together, vibrating side to side
blue, red, green
False. Mixtures can be separated into parts by physical changes, but not by chemical changes.
What does HHPS stand for?
Hazardous Household Products Symbols
Why does food colouring dissolve slower in cold water than hot water? Explain using kinetic molecular theory
Higher temperatures=greater energy for particles. Particles move slower in cold water and therefore it takes longer for food colouring to mix and for new particles to move from areas of high concentration to areas of low concentration.
Describe what is happening to molecules when they are going from a gas to a liquid.
losing energy and moving slower, becoming more compact
Does the density of a substance change when the amount of substances increases?
No.