3Balancing Equations

Word Equations

What is the big idea?

The universe is balanced!

Al

I

Al

I

__Al(s) + __ I2(g) __ AlI3(s)3 22

Balance the equation

Each element has the same number on each side

ProductsReactants

2

6

2

6

You can only put coefficients in front of each formula

The total number of atoms is the coefficient x the subscript

__C3H8(s) + O2(g) __ CO2(g) + __ H2O(g) 5 43

10 Oxygen

+

10 Oxygen

6 Oxygen 4 Oxygen

½ is allowed but not ¼……….

__C8H18(s) + __ O2(g) __ CO2(g) + __ H2O(g) 12.5 98

25 Oxygen

+

25 Oxygen

16 Oxygen 9 Oxygen

½ is allowed but not ¼……….

Phase Symbols

(s) solid Fe(s)

(l) liquid H2O(l)

(g) gaseous O2(g)

(aq) aqueous NaCl(aq)

dissolved in water

Common Acids

HCl Hydrochloric Acid

H2SO4Sulphuric Acid

H3PO4 Phosphoric Acid

HNO3 Nitric Acid

CH3COOH Acetic Acid

H2CO3 Carbonic Acid

Stomach

Coke Fluoride Treatment

Vinegar

Dissolving metals

Acid Rain

Carbonated Beverages

Hydrates

MgSO4.5H2O Magnesium sulphate pentahydrate

BaCl2.6H2O Barium chloride hexahydrate

FeSO4.H2O Iron II sulphate monohydrate

Greek prefixes

1 – mono

2 – di

3 – tri

4 – tetra

5 – penta

6 - hexa

7 - hepta

8 - octa

9 – nona

10 - deca

11 - undeca

12 - dodeca

3 3 2

Word Equations

A solution of barium phosphate is mixed with aqueous sodium sulphate to yield solid barium sulphate and aqueous sodium phosphate.

Ba3(PO4)2(aq) + Na2SO4(aq) → BaSO4(s) + Na3PO4(aq)

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)3236

Oxidizing MaterialCombustible Material

What happens if you mix?

Who wants to try it?

and

H2SO4

Demo: Solid sucrose reacts with oxygen to produce carbon dioxide gas, water, and energy. The catalyst H2SO4 initiates the reaction.

C12H22O11(s) + O2(g) CO2(g) + H2O(l) + energy

The catalyst goes on top of the arrow

12 12 11

Workbook Assignment # 3