iGCSE Chemistry sum up

A reducing agent

• Is itself oxidised
• Is itself reduced
• Causes something else to gain electrons
• Is usually a compound of group 7

Iron Oxide...

• Is oxidised when it loses oxygen
• Is oxidised because it loses electrons
• Is reduced when it gains oxygen
• Is reduced when it loses oxygen

For any given metal the type of bonding is

• Ionic
• Covalent
• Metallic
• Intermolecular

Potassium Hydroxide is

• Soluble because of SP
• Insoluble because of a large ion
• Soluble because its of NO3
• Insoluble because its an exception

Silver nitrate is

• Soluble because of SP
• Insoluble because of a large ion
• Soluble because its of NO3
• Soluble because its an exception

Sodium carbonate

• Soluble because of SP
• Insoluble because of a large ion
• Soluble because its of NO3
• Soluble because its an exception

Magnesium nitrate

• Soluble because of SP
• Insoluble because of a large ion
• Soluble because its of NO3
• Soluble because its an exception

Calcium Carbonate is

• Soluble because of SP
• Insoluble because of a large ion
• Soluble because its of NO3
• Soluble because its an exception

To separate an insoluble salt and water i would use

• Filtration
• Simple distillation
• Fractional distillation
• Chromatography

To separate ethanol and hexanol I would use

• Filtration
• Simple distillation
• Fractional distillation
• Chromatography