Practical 33 Testing for Negative ions

Practical 33 Testing for Negative ions :                 

HazCard : 47A 27C 55C 55B 59B 2B 27A 26 95A 47A 67 87 10A

For each student/pair :

• Several test tubes and racks

• Distilled water

• Test tubes bung

• Test tube bung with delivery tube (U-type shape) to go from on test tube to another sat alongside it in a test tube rack

• Marker pen

General class :

The following solids in screw cap bottled labelled with letter show. 

Each bottle should be on a mat and have a spatula

• A = Lithium bromide

• B = Potassium iodide

• C = Copper (II) sulphate

• D = Sodium Chloride

• E = Calcium sulphate

• F = Iron (III) sulphate

• G = Iron (II) sulphate

• H = Magnesium sulphate

• I = Aluminium sulphate

• J = Copper (II) chloride

• K = Calcium nitrate

• L = Copper (II) carbonate

• M = Sodium Carbonate (Not listed on Positive ions practical)

• Several bottle of each of the following (possible one per bench or similar set up)

  • Hydrochloric acid 2.0 M

  • Nitric Acid 2.0 M

  • Silver Nitrate (aq) 0.05 M

  • Barium chloride (aq) 0.1 M

  • Limewater