4.1 - Types of Inorganic Reactions

• thermal decomposition


  reaction in which a compound decomposes on heating
• thermal decomposition example


  green copper (II) carbonate decomposes when heated by a bunsen flame to form black copper (ll) oxide and carbon dioxide
• why carbonates below copper in the ractivity series Cannot exist at room temperature

  they are too unstable
• thermal decomposition of hydrated compounds

  fairly gentle heating Causes hydrates to give off water vapour which condenses into water
• ionic equation


  describes chemical equations by showing only the reacting ions in solution, leaving out spectator ions
• what happens when acids mix with water

  produce H+ ions which are actually hydroxonium ions - H3O+
• acid + metal


  salt+ hydrogen
• acid + metal oxide

  salt + water
• Acid + carbonates


  carbon dioxide + water + salt
• ionic equation for neutralisation

  H+ + OH- →H2O
• ionic precipitation reactions


  a reaction which produces a Solid precipitate on mixing 2 solutions containg ions
• what happens when ionic compounds dissolve in water

  ions move away from crystals and each ion becomes surrounded by water Molecules
• soluble compounds


  sodium

  nitrates

  ammonium

  potassium

  chlorides

  sulfates
• insoluble compounds


  silver and lead (II) chloride

  barium, calcium and lead (ll) sulfate

  carbonates

  hydroxides