4. Laboratory Safety
a) WHMIS stands for Workplace Hazardous Information System
b) HHPS stands for Household Hazardous Product Symbols
c)
Label the following WHMIS and HHPS symbols:
Corrosive
Toxic
Danger Corrosive
Poisonous
5. a) A physical property is a characteristic of a substance that can be
observed and measured without changing the identity of the
substance.
b) State five physical properties: colour, hardness, malleability, ductility
c) A chemical property is the ability of a substance to change or react ,
and to form new substances.
d) State three chemical properties: combustibility, reaction with an acid,
stability, toxicity
6. a) State if the following is a physical (P) or chemical(C) property:
i) The melting point of lithium chloride is 610C
P
ii) Iron rusts when exposed to moist air
C
b) A qualitative observation can be described but not measure.
c) A quantitative observation can be measured and assigned a particular
value.
7. Classify the following as qualitative or quantitative:
i)
The arena had a cold temperature :qualitative
ii)
The classroom has an area of 20 m2:quantitative
8. The three states of matter are: solid, liquid, gas
9. Name the changes of state: solid to gas
liquid to solid: freezing, solidification
sublimation
liquid to gas: evapouration
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