Science 10 Review

1
3Balancing EquationsWord Equations
2
What is the big idea?
The universe is balanced!
3
Balance the equation
3
2
__Al(s) __ I2(g) ? __ AlI3(s)
2
Products
Reactants
Al I
Al I
2
2
6
6
Each element has the same number on each side
You can only put coefficients in front of each
formula
The total number of atoms is the coefficient x
the subscript
4
__C3H8(s) O2(g) ? __
CO2(g) __ H2O(g)
5
4
3

6 Oxygen
4 Oxygen
10 Oxygen
10 Oxygen
½ is allowed but not ¼.
5
__C8H18(s) __ O2(g) ? __
CO2(g) __ H2O(g)
12.5
9
8

16 Oxygen
9 Oxygen
25 Oxygen
25 Oxygen
½ is allowed but not ¼.
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Phase Symbols
(s) solid Fe(s)
(l) liquid H2O(l)
(g) gaseous O2(g)
(aq) aqueous NaCl(aq)
dissolved in water
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Common Acids
HCl Hydrochloric Acid
Stomach
Acid Rain
H2SO4 Sulphuric Acid
H3PO4 Phosphoric Acid
Coke Fluoride Treatment
HNO3 Nitric Acid
Dissolving metals
CH3COOH Acetic Acid
Vinegar
H2CO3 Carbonic Acid
Carbonated Beverages
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Hydrates
MgSO4.5H2O
Magnesium sulphate pentahydrate
BaCl2.6H2O
Barium chloride hexahydrate
FeSO4.H2O
Iron II sulphate monohydrate
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Greek prefixes
1 mono
7 - hepta
8 - octa
2 di
9 nona
3 tri
10 - deca
4 tetra
11 - undeca
5 penta
6 - hexa
12 - dodeca
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Word Equations
A solution of barium phosphate is mixed with
aqueous sodium sulphate to yield solid barium
sulphate and aqueous sodium phosphate.
3
3
2
Ba3(PO4)2(aq)
Na2SO4(aq)
?
BaSO4(s)
Na3PO4(aq)
11
A solution of aluminum chloride, carbon dioxide,
and water can be prepared by mixing pure aluminum
carbonate with a solution of hydrochloric acid.
Al2(CO3)3(s)
HCl(aq)
?
CO2(g)
AlCl3(aq)
H2O(l)
3
2
3
6
12
What happens if you mix?
and
Oxidizing Material
Combustible Material
Who wants to try it?
13
Demo Solid sucrose reacts with oxygen to produce
carbon dioxide gas, water, and energy. The
catalyst H2SO4 initiates the reaction.
H2SO4
C12H22O11(s)
O2(g)
CO2(g)
H2O(l)
energy
12
12
11
The catalyst goes on top of the arrow
Workbook Assignment 3