Snc2l Chemistry Review for Final Exam

SNC2L CHEMISTRY/SCIENCE IN THE MEDIA: REVIEW FOR FINAL EXAM

What must you PREPARE for:  Identify physical properties of objects  Specifically describe how physical and chemical changes have occurred  Identify unknown substances as acids or bases using pH tests  Know how factors affect the speed of a chemical reaction  Know WHMIS and HHPS  Identify the manipulated, controlled and responding variables in an experiment  Identify whether an advertisement claim can be tested

PART A: PHYSICAL PROPERTIES

Physical properties describe something. Match the physical properties on the left to the best description/example on the right by writing its corresponding letter in the spaces provided.

1. a) Ability of an object to be bent into Texture different shapes. 2. b) Red, blue, yellow, clear Viscosity 3. c) Ability of a substance to be broken Physical state apart. Diamond is hard. Sponge is soft. 4. d) Shiny, dull, metallic Clarity 5. e) Ability of a substance to be Colour dissolved in water 6. f) The feel of a substance (gritty, soft, Odour smooth). 7. g) Solid, liquid, gas Malleability 8. h) How a liquid flows. Hardness 9. i) The smell of a substance Lustre 10. j) Ability to see through an object Solubility in Water

PART B: PHYSICAL AND CHEMICAL CHANGES

Physical change: the substance may change its SIZE or SHAPE, but it is still the SAME substance.

Chemical change: two or more substances react together to make a NEW substance.

Evidence of a chemical change can be: a) gas bubbles d) new smell b) temperature change e) sound heard c) new colour f) a solid forms (precipitate)

Fill the table below:

Situation P or C change? How do you know? An ice cube is melting on the countertop.

You open up a can of pop, which fizzes.

You mix two liquids together. White particles can be seen at the bottom of the test tube.

A block of wood is sanded. PART C: ACIDS AND BASES

A pH scale can help you determine if a substance is an acid or a base. Anything with a pH of below ______is an acid. Anything with a pH of greater than ______is a base.

Name 3 acids: ______

Name 3 bases: ______

PART D: FACTORS AFFECTING RATES OF REACTIONS

There are factors that affect the speed of a reaction. Some of the factors are listed below. Decide (circle) which situation will happen FASTER and EXPLAIN WHY:

Factor Situation 1 Situation 2 Explain Why: A banana ripening in A banana ripening Temperature the fridge on the counter A spoonful of loose A whole sugar cube Surface Area sugar dissolving in a dissolving in a cup of cup of water water Dying your hair with Dying your hair with Concentration concentrated bleach dilute bleach.

PART E: ADVERTISEMENT CLAIMS a) What is the product in this advertisement?

______b) What is the claim of the advertisement?

______

______c) Do you think the claim is true? (Circle)

YES NO d) What would you do to test the claim?

______

PART F: VARIABLES

“Three different species of plants are given the same fertilizer. Their (growth) height is recorded over the next two weeks.” Using the statement, decide the variables are:

Type of Variable What It Means Answer

Manipulated The factor that is changed

The factor that changes as Responding a result (end result)

The factor that is kept the Controlled same