The aim of this investigation - Sample Essay

Method: 1. First of all complete an appropriate risk assessment. 2. Collect all the apparatus you require for this experiment. 3. Weigh out around 5g of your impure sample of mummion using a weighing scale. 4. Then add your weighed sample to 100cm3 of distilled water in a conical flask. 5. Then stir and dissolve the Mummion, leaving the sand and iron (III) oxide as insoluble solids. 6. Then use filtering paper to filter the mixture to remove all the insoluble impurities.

7. Next, boil the filtrate which then is a colourless solution of mummion, in an evaporating basin until when there’s only about 15cm3 remain. Take precautions as the solution may spit out when being boiled. 8. Let the solution cool down when there’s white crystals of mummion remaining in the basin. 9. Then remove the crystals from the liquid by filtration and then dry them on a filter paper in air. Flame test: 1. Using a tong the wire loop was dipped into hydrochloric acid 2. This wire loop contaminated with hydrochloric acid is then held in the blue flame of the Bunsen burner.

3. After this, there should be a instant colour change Annion Test: Results: Flame test: Flame test was carried out to define what cation was present in the mummion crystals. The colour of flame that we got was of yellow/orange, by looking at this I could say that chloride was present in the mummion. Test for carbonate anion: This was carried out using test tubes and the colour change was observed. This was to test whether a negative or positive ion was present. Test for ‘Carbonate anion’ CO32- . CO32- (aq) + 2H +(aq)–> CO2 (gas) + H2O(l).