Skills Lab: Combination of Matter

Essential Question:

When I burn something, does it get heavier or lighter?

Mg + O2

Problem:

Does burning Magnesium make it heavier or lighter?

TITLE: Burning Magnesium

Mg + O2

Chemical Reaction

+

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…’

If Magnesium is ignited/burned, then…… because……..

Qualitative hypothesis:

Mg + O2 MgO

Hypothesis:Quantitative:

2Mg + O2 2MgOBalanced equation:

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

Mass of Magnesium

How do you burn?

Partial or complete?

Mass of Mg (initial mass)

Mass of Mg and container

To prevent errors

Complete burning

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 Your Mark

Teacher’s Mark

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 drawn (labels down right hand side)

2

Materials are listed with necessary quantitative information (amount and size); Method - consists of easy to follow numbered steps (not written as a narrative). Uses third person.

3

Individual (Lab Grade): TOTAL (OUT OF 15) 15

Mg + O2 MgO

Hypothesis:Quantitative:

2Mg + O2 2MgOAtomic Mass:

24 16 40

(2 x 24) (2 x 16) (2 x 40)

48 32 80

Balanced equation:

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