Types of reactions

Question 1

Double displacement reaction: Precipitation Reaction

Answer 1

Two compounds dissolved in aqueous solution react to form a solid (precipitate)

AB (aq) + CD (aq) —> AD (s) + CB (aq)

Question 2

Double displacement reaction: Neutralization Reaction

Answer 2

Reaction between a base and an acid to produce salt and water.

Acid + Base —> Salt + Water
Eg. HCl (aq) + NaOH (aq) —> NaCl (aq) + H2O (l)

Question 3

Single Displacement Reaction: Hydrogen displacement reaction

Answer 3

If the element is a metal it replaces the hydrogen in the compound

Eg. Sr + 2 H2O —> Sr(OH)2 + H2

Question 4

Single Displacement Reaction: Metal displacement reaction

Answer 4

If the element is a metal it replaces the metal in the compound.

Eg. TiCl4 + 2 Mg —> Ti + 2 MgCl2

Question 5

Single Displacement Reaction: Halogen displacement reaction

Answer 5

If the element is a metal it replaces the non-metal in the compound

Eg. Cl2 + 2 KBr —> 2 KCl + Br2

Question 6

The Activity Series For Halogens

_ > _ > _ > _

Answer 6

F2 > Cl2 > Br2 > I2

Strong… Weak

Question 7

Combination (Synthesis) Reaction

Answer 7

2 (or more) reactants combine to give one single product

A + B —> C

Eg. 2 Al + 3 Br2 —> 2 AlBr3

Question 8

Decomposition Reaction

Answer 8

A single reactant breaks down to give two or more products

C —> A + B

Eg. 2 KClO3 —> 2KCl + 3O2

Question 9

Combustion Reaction

Answer 9

The burning of a compound in oxygen with the evolution of heat and light.

If the compound is a hydrocarbon the products of complete combustion are always carbon dioxide and water.

Eg. CH4 (g) + 2 O2 (g) —> CO2 (g) + 2 H2O (g)

Question 10

Hydrates

Answer 10

They are compounds that have a specific number of water molecules attached to them.

IE. LiCl • 2H2O

Question 11

Ionic compounds

Answer 11

Metal + Nonmetal

• > Cation (metal): write down the name of the element
• > Anion (nonmetal): add ‘’ide’’ to element name or write down the name of the polyatomic ion

Question 12

Acid

Answer 12

It is a substance that yields hydrogen ions (H+) when dissolved in water.

IE. HCl (Hydrogen Chloride)
—> Dissolved in water it becomes hydrochloric
acid (if there is an ‘’aq’’ at the end)

Question 13

Oxoacid

Answer 13

It is an acid that contains hydrogen, oxygen, and an other element.

IE. HNO3 (aq) (Nitric Acid)
IE. H2CO3 (aq) (Carbonic Acid)
IE. H2SO4 (aq) (Sulfuric Acid)

Question 14

Base

Answer 14

It is a substance that yields hydroxide ions (OH-) when dissolved in water.

IE. NaOH (sodium hydroxide)
IE. KOH (potassium hydroxide)
IE. Ba(OH)2 (barium hydroxide)