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:

(Specific) 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?

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