WHMIS and Safety
Classifying Matter
Concentration and Solubility
Affecting Solubility
Behaviour of Mixtures and Scientific Theory
100
Name this WHMIS Symbol
Gas Cylinder
100
Sugar is a...
pure substance
100
what is a solute?
The material that is being dissolved.
100
If you increase heat to a solution for a solid solute, how does that change solubility?
increases solubility
100
In an experiment, the one variable that is changed is called the
manipulated variable
200
What does WHMIS stand for?
Workplace Hazardous Materials Information System
200
Italian salad dressing is a...
suspension
200
What is a solvent?
The material that the solute is being dissolved into.
200
If you increase heat to a solution for a gas solute, how does that change solubility?
decrease solubility
200
What are the 5 main ideas of the particle model of matter?
1. Space
2. Tiny
3. Attraction
4. Moving
5. Pure
300
What is a slurry?
a mixture of solid and liquid
300
What are the two categories matter can be classified by?
mixtures and pure substances
300
If you add more solvent to a solution, does it increase or decrease concentration?
decrease concentration
300
What is a saturated solution?
a solution that has the maximum amount of solute in a solution
300
A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the responding variable is
number of plants that can live in the water
400
What is the name of this WHMIS symbol
Flame over circle
400
milk is a...
colloid
400
You are making hot chocolate, you add 25g of hot chocolate mix to 150ml of hot water. What is the concentration of the hot chocolate mixture?
16.7g/ml
400
What does supersaturated mean?
having more solute than saturation, crystals will no longer dissolve
400
What are the 3 factors that affect the rate of dissolving?
temperature, small pieces and stirring
500
What is the hazard associated with this WHMIS symbol
Irritant, acute toxicity (harmful)
500
True or false: All pure substances are homogeneous, and all homogenous substances are pure substances
false, All pure substances are homogeneous, but NOT ALL HOMOGENEOUS SUBSTANCES ARE PURE.
500
You are able to dissolve 30g of coffee whitener in 200mL of 30°C water before it reaches saturation point.
What is the solubility of the coffee whitener at 30°C?
15g/100ml
500
What is solubility?
the maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature
500
Write the following in order: analyze data, test hypothesis, ask a question, make a hypothesis, write a conclusion
1. ask a question
2. make a hypothesis
3. test hypothesis
4. analyze data
5. write a conclusion