Inorganic

• Monomer


  The molecule from which the polymer is made
• Repeat unit


  The section of the polymer the molecule forms
• Addition polymerisation


  • Adding molecules together by opening a double bond (needs a catalyst)
• Condensation polymerisation


  • Linking molecules by removing water
• Test for group 2 metal cations using dilute sodium hydroxide

  1. Barium chloride

  2. Sodium hydroxide solution in excess
• Test for group 2 metal cations using dilute sulphuric acid

  1. Barium chloride

  2. Sulfuric acid in excess
• Test for ammonium ions

  1. Ammonium chloride

  2. Sodium hydroxide

  3. Heat with water bath

  4. Test fumes with damps red litmus paper
• Test for hydroxide ions in aqueous solution

  1. Sodium hydroxide in test tube with red litmus paper

  2. Record observations
• Test for ammonia


  1. Ammonia solution on filter paper in Petri dish

  2. Damp red litmus paper on other side of petri dish

  3. Record observations
• Test for carbonate ions in aqueous solution

  1. Calcium hydroxide in one test tube

  2. Sodium carbonate and hydrochloric acid in different test tube

  3. Delivery tube with open end in the limewater
• Test for sulphate ions in aqueous solution

  1. Magnesium sulphate solution

  2. Dilute hydrochloric acid

  3. Barium chloride solution
• Test for halide ions in aqueous solution

  1. Potassium chloride

  2. Dilute nitric acid and shake

  3. Silver nitrate solution

  4. Excess of ammonia solution and shake

  5. Repeat using concentrated ammonia solution
• Test for chloride ions in solid salts

  1. Small spatula of solid in test tube

  2. 3 drops of concentrated sulphuric acid

  3. Record what happens

  4. Test gas with blue litmus paper
• Test for bromide ions in solid salts

  1. Small spatula of solid in test tube

  2. 3 drops of concentrated sulphuric acid

  3. Record what happens

  4. Test gas with filter paper that has been dipped in acidified potassium dichromate solution
• Test for iodide ions in solid salts

  1. Small spatula of solid in test tube

  2. 3 drops of concentrated sulphuric acid

  3. Record what happens

  4. Test gas with filter paper that has been dipped in lead nitrate solution
• Positive result for barium when tested with sodium hydroxide

  Colourless solution
• Positive result for calcium when tested with sodium hydroxide


  Slight white precipitate
• Expected result for magnesium when tested with sodium hydroxide

  White precipitate
• Expected result for strontium when tested with sodium hydroxide


  Slight white precipitate
• Positive result for barium when tested with sulphuric acid

  White precipitate
• Positive result for calcium when tested with sulphuric acid


  Slight white precipitate
• Positive result for magnesium when tested with sulphuric acid

  Colourless solution
• Positive result for strontium when tested with sulphuric acid


  White precipitate
• Positive result for ammonium ions

  Turns damp red litmus paper blue
• Positive result for hydroxide ions

  Turns damp red litmus paper blue
• Positive result for ammonia

  Turns damp red litmus paper blue
• Positive result for carbonate ions

  Turns limewater cloudy
• Positive result for sulphate ions


  White precipitate