Skills Lab: Combination of Matter
Essential Question:
When I burn something, does it
get heavier or lighter?
Mg + O2
TITLE: Burning Magnesium
Problem:
Does burning Magnesium
make it heavier or lighter?
Chemical Reaction
Mg + O2
+
Aim:
Does burning Magnesium make it heavier or lighter?
What type of chemical reaction is involved?
Hypothesis: A statement that predicts what will happen. Use the structure:
‘If…then…because…’
Qualitative hypothesis:
If Magnesium is ignited/burned, then……
because……..
Hypothesis:
Quantitative:
Mg + O2
MgO
Balanced equation:
2Mg + O2
2MgO
Problem:
How much magnesium oxide will be
produced from burning ___ g of Mg?
How much magnesium oxide will be
produced from burning 0.24g of Mg?
Mass of Magnesium: 0.24 g
Mass of container:
_____
Mass (initial) of Magnesium and container: _____
Mass (final) of Magnesium and container: _____
Predicted Mass of MgO: _______
Final Mass of MgO: _______ heavier or lighter than Mg?
AIM: Does burning Magnesium make it heavier or lighter?
Burning of
Magnesium
How do you burn?
Mass of
Magnesium
Mass of Mg (initial mass)
Complete burning
To prevent errors
Partial or complete?
Mass of Mg and container
Set-up and procedure:
1. What materials are you going to use? Draw your set-up.
2. How would you design your test? Write a step by step procedure.
Do not look at burning Mg directly. It may
cause damage to your eye?
Part 1: Planning
Assessment Criteria
Points
Title and Date are provided; properly headed
1
Background links the lab to the main topic on chemical reaction
1
Aim includes the variables being tested
2
Variables (independent, dependent, constant) are correctly identified
3
Hypothesis Qualitative/Quantitative (If, then… because….)
3
Diagram of apparatus is neatly drawn and labeled appropriately; ruler and pencil
2
drawn (labels down right hand side)
Materials are listed with necessary quantitative information (amount and size);
Method - consists of easy to follow numbered steps (not written as a narrative).
3
Uses third person.
Individual (Lab Grade):
TOTAL (OUT OF 15)
15
Your
Mark
Teacher’s
Mark
Hypothesis:
Quantitative:
Mg + O2
MgO
Balanced equation:
2Mg + O2
Atomic
Mass:
24
(2 x 24)
48
2MgO
16
40
(2 x 16)
(2 x 40)
32
80
How much magnesium oxide will be produced from burning 0.24g of Mg?
Predicting the mass of MgO:
X g MgO
Mass of Mg
=
80g MgO in balanced reaction
48g Mg in balanced reaction