Balancing Reactions

The basics

100

The name for a number you place in front of a chemical species to balance a reaction

Coefficient

200

What is the name for the chemical formulas after the reaction takes place (right side of the equation)

Products

300

What is the name for the chemical formulas you have before the reaction takes place (left side of the equations)

Reactants

400

What law requires us to balance chemical reactions

law of conservation of matter

500

Name for a small letter(s) in parenthesis after the formula that describes the state of the chemical

Phase Indicator

Counting atoms

100

Number of each type of atom:
CO₂

C - 1
O - 2

200

Number of each type of atom:
Ca(OH)₂

Ca - 1
O - 2
H - 2

300

Number of each type of atom:
Mg(NO₃)₂

Mg - 1
N - 2
O - 6

400

Number of each type of atom:
3 Ca(OH)₂

Ca - 3
O - 6
H - 6

500

Number of each type of atom:
2 Mg(NO₃)₂

Mg - 2
N - 4
O - 12

Ionic Formulas

100

Calcium Chloride

CaCl₂

200

Potassium Sulfate

K₂SO₄

300

Magnesium Nitrate

Mg(NO₃)₂

400

Sodium Oxalate

Na₂C₂O₄

500

Ammonium Carbonate

(NH₄)₂CO₃

What are the coefficients

100

__ N₂ + __ H₂  ⇨ __ NH₃

1  3  2

200

 __ K + __ H₂O  ⇨ __ KOH + H₂

2  2  2  1 

300

__ AlBr₃ + __ I₂  ⇨ __ AlI₃ + __ Br₂

2  3  2  3  

400

__ FeCl₃ + __ NaOH  ⇨ __ Fe(OH)₃ + __ NaCl

1  3  1  3

500

__C₄H₁₀ + __O₂  ⇨ __CO₂ + __H₂O

2   13   8   10

Total on a side

100

How many oxygen atoms are this side of a reaction
⇨ 2 NaOH + H₂

4

200

How many oxygen atoms are this side of a reaction
⇨ P₂O₅ + 3 H₂O

8

300

How many oxygen atoms are this side of a reaction
⇨ 12 CO₂ + 6 H₂O

30

400

How many lithium atoms are this side of a reaction
3 LiNO₃ + 10 Li ⇨

13

500

How many oxygen atoms are in this side of a reaction
⇨ Bi₂(SO₄)₃ + 2 Al(NO₃)₃

30