Chemistry- Reactions

• Oxidation is when a substance react with oxygen to form a compound
• Test for oxygen:

  Insert a glowing splint into the gas, if the gas is oxygen, the splint will relight
• metal oxides are basic, they react with acids and neutralise them. Some metal oxides dissolve in water to produce alkaline solutions.

  ( neutralise means balances out with a solution )
• General equation for oxidation:

  METALS + OXYGEN --> METAL OXIDE
• Non-metal oxides are acidic- they react with bases and neutralise them. Some non-metal oxides dissolve in water to produce acidic solutions.
• combustion is the burning of fuels to release energy
• Test for Carbon Dioxide:

  white precipitate is formed after being bubbles through limewater
• Test for water:

  anhydrous cobalt chloride paper ( blue to pink )
• Word equation for combustion:

  Hydrocarbon + oxygen --> carbon dioxide + water
• Incomplete combustion is when there is a poor supply of oxygen and carbon monoxide is produced
• Word equation for Incomplete combustion:

  Hydrocarbon + oxygen --> water + carbon dioxide + carbon monoxide
• An exothermic reaction is a reaction that releases energy to the surroundings.
• An endothermic reaction is when energy is taken in from the surroundings.