4/25/05 Types of Chemical Demonstration

 

Types of Reaction

Word Equation of the Reaction

 

Reactants

 

Products

 

Observations
Write what you see during the demonstration.

Synthesis

A + X -->AX

A solid magnesium and oxygen gas yield a solid magnesium oxide.

Decomposition

AX --> A + X

A decomposition of liquid water yields hydrogen gas and oxygen gas.

Single-Replacement

A + BX --> AX +B
Y + BX --> BY + X

A solid zinc and aqueous hydrochloric acid yield aqueous zinc chloride and hydrogen gas

Double Replacement

AX + BY --> AY + BY

Aqueous copper nitrate and sodium hydroxide yield copper hydroxide and sodium nitrate

Combustion

Substance + O2 à large amount of energy ( light and heat)

 

Methane gas and oxygen gas yield carbon dioxide and water vapor


 

Types of Reaction

Word Equation of the Reaction

 

Formula Equation

Balanced
Chemical Equation

Synthesis

A + X -->AX

A solid magnesium and oxygen gas yield a solid magnesium oxide.    

Decomposition

AX --> A + X

A decomposition of liquid water yields hydrogen gas and oxygen gas.    

Single-Replacement

A + BX --> AX +B
Y + BX --> BY + X

A solid zinc and aqueous hydrochloric acid yield aqueous zinc chloride and hydrogen gas    

Double Replacement

AX + BY --> AY + BY

Aqueous copper nitrate and sodium hydroxide yield copper hydroxide and sodium nitrate    

Combustion

Substance + O2 yield large amount of energy ( a light and heat)

 

Methane gas and oxygen gas yield carbon dioxide and water vapor

   

Key Words: Oxide, precipitates, electrolysis, no reaction (Bromide and Potassium Chloride),
reversible reaction, formula equation, word equation, balanced chemical equation

Indications of Chemical Reactions

  1. Evolution of heat and light
  2. Production of gas.
  3. Formation of Precipitates
  4. Color Change