Name: ______________________________________________
Teacher’s Name:
______________________________________
Date:
Class:
______________________________________
______________________________________________
Alexander Mackenzie High School
Applied Science
Grade 9
Lab. #2 – Matching Models and Formulas.
Knowledge:
__________ / 12
Application:
__________ / 16
Communication:
__________ / 7
Thinking:
__________ / 15
Purpose: (K - _____ / 1 mark)
______________________________________________________________________________________________________________________
Materials: (K - _____ / 6 marks)
Note: You can use only one atom of element one (1) in each molecule. However, you can use as many atoms of element two (2) as are needed.
CAUTION: Molecular model kits. The parts of the kits are not toys. Use them only as instructed and only for the purposes of the lab.
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Procedure / Method: (C - _____ / 5 marks)
1. The elements in the model kit are coloured-coded. Record the name and colour of each element you need.
2. Use the “atoms” and “bonds” provided to build a model of each combination of elements listed in your table in the chart under the section Data /
Observations (K - 5 marks).
3. Count the number of atoms of each element in your model. Sketch each molecule, draw the Lewis structure and write its chemical formula in the
table under the section Data / Observations.
Clean up: Un-connect all bonds from the atom models and replace in the box. Inspect around your table top and on the floor for lost
atoms or bonds.
Data / Observations: (A - _____ marks)
Fill in the table below. (K - _____ / 5 marks)
Table #1: Elements and their respective colours.
Element
Colour
Element
Colour
Element
1. Carbon
3. Oxygen
5. Nitrogen
2. Hydrogen
4. Halogen
6. Sulfur
Colour
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Fill in the table below. (A - _____ / 9 marks)
Table #2: Building Models of Molecules.
Part A: Complete the following table.
Element 1
Element 2
Element 3
N
H
-
H
Cl
-
C
Cl
-
H
S
-
Chemical
Chemical
Formula
(Application 1 mark per blank)
Name
(Communication 1 mark per blank)
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Part B: Complete the following table.
Element 1
Element 2
N
H
H
Cl
C
Cl
H
S
Picture of Model
(Application - 4 marks)
Bonding Structure of Model
(Application - 4 marks)
Analyze and Evaluate / Discussion: (C - _____ / 4 marks)
1.
(a)
List at least two (2) molecules that are elements? (C - 1 mark)
_______________________________________________________________________________________________________________
(b)
List at least two (2) molecules that are compounds? (C - 1 mark)
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2.
Compare (What is similar? What is different?) the bonding in the Cl2 and O2 molecules? (C - 2 marks)
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Similarities
Differences
3.
Apply and Extend / Conclusion: (T - _____ / 6 marks)
Answer the following questions:
1.
The natural gas that the bunsen burner uses in the laboratory consists mostly of methane. Its chemical formula is CH4. When this gas
burns, it reacts with oxygen (O2), and produces water (H2O) and carbon dioxide (CO2).
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2.
Use the kit to build a model of a methane molecule and two molecules of oxygen. Draw and label your model. Be neat and tidy!! (T - _____
/ 4 marks)
3.
Use the kit to build a model of a water molecule and carbon dioxide. Draw and label your model. Be neat and tidy!! How many of each
molecule do you get? (T - _____ / 5 marks)
4.
Propane (C3H8) is a fuel commonly used for barbecues.
(a)
Use the kit to build a model of a propane molecule. Draw and label your model. Be neat and tidy!! (T - _____ / 2 marks)
(b)
State the two (2) WHMIS classification under which propane will be labelled under. (T - _____ / 2 marks)
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(c)
Besides cooking, list two (2) other different uses of propane in everyday life. (T - _____ / 2 marks)
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Sources of Error (Bonus: T - _____ / 1 mark)
State one (1) problem noted as you completed the lab.
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