Experiment 7 To observe the reactions of the halide ions Directions : Place small amounts of sodium/potassium chloride , bromide , iodide in three separate test tubes . Add an equal volume of concentrated sulphuric acid . Observe . Test any effervescence with moist litmus paper . Repeat (with fresh solutions) using silver nitrate , observe add aqueous ammonia and observe . Observations : SBA CRITERIA : OBSERVATION , RECORDING AND REPORTING Correct Observations 12 mks Equations 6 mks Table 2 mks