Chemistry

Balancing reactions

100

 Na3PO4 +  KOH -->  NaOH +  K3PO4

1 Na3PO4 + 3 KOH --> 3 NaOH + 1 K3PO4

200

 MgF2 +  Li2CO3 --> MgCO3 +  LiF

1 MgF2 + 1 Li2CO3 --> 1 MgCO3 + 2 LiF

300

 P4 +  O2 --> P2O3

1 P4 + 3 O2 --> 2 P2O3

400

 RbNO3 +  BeF2 -->  Be(NO3)2 +  RbF

2 RbNO3 + 1 BeF2 --> 1 Be(NO3)2 + 2 RbF

500

 AgNO3 +  Cu -->  Cu(NO3)2 +  Ag

2 AgNO3 + 1 Cu --> 1 Cu(NO3)2 + 2 Ag

Atom Counting

100

NaOH

One sodium

One Hydroxide

200

3 Al2O3

Six Aluminum

9 oxygen

300

NH4Cl

One ammonium 

One Chlorine

400

5 ZnSO4

Five Zinc

One Sulfate

500

Li2SO4

Two Lithium

One Sulfate

Predicting products

100

NaOH+HClO4-->

Double

NaClO4+H2O

200

AlN-->

Decomposition

2AlN-->2Al3+N

300

CaCl2+K2CO3

Double

CaCO3+2KCl

400

H2SO4+2KOH

Double

H2SO4+2KOH-->2H2O+K2SO4

500

Al+O2

Synthesis

4Al+3O2-->2Al2O3

Solubility rules

100

Salts of Alkali Metals

Soluble

Exceptions: Some Lithium Compounds 

200

Nitrate salts and Chlorate salts

Soluble

Exceptions:Few

300

Sulfate Salts

Soluble

Exceptions: Compounds of Pb, Ag, Hg, Ba, Sr, and Ca

400

Chloride Salts

Soluble

Exceptions: Compounds of Ag and some compounds of Hg and Pb

500

Carbonates, Phosphates, Chromates, Sulfides, and Hydroxides

Insoluble

Exceptions: Compounds of alkali metals and of ammonia

Types of reactions

100

2Mg+O2-->2MgO

Combination

200

2HgO-->2Hg+O2

Decomposition

300

2K+H2O-->2KOH+H2

Single replacement

400

Na2S+Cd(NO3)2-->CdS+2NaNO3

Double Replacement

500

C2H6+3O2-->2CO2+3H2O

Combustion