CHEMISTRY PRACTICAL REPORT Aim: To test nine substances for conductivity, solubility, appearance and melting point and find out if they were polar, non polar, continuous, ionic or metals. Method: 1) The first step is to collect your safety glasses and coat. 2) The next step is to collect your equipment you need nine substances, power pack, conductivity kit, test tubes, water, turps and Bunsen burner. 3) Next you start testing your substances you can start with any test. If you start with conductivity you need to test if it conducts as a solid.
Then test if it melts over a Bunsen burner for its melting point and if it conducts as a melt. (Obviously it's N/A if the substance doesn't melt) Then there is solubility to do this you have to add water to a set of substances and turps to a separate set and see if it dissolves and if it conducts with water or turps in it. The third is appearance all you have to do for this is look at it and record what it looks like. 4) After you complete the test record your results.
5) After you have finished all the tests and recorded your results record whether you think they are metals, continuous, polar, non-polar or ionic. Results: The first set of results I took was the materials appearances all were crystals. A was a lite brown colour with big crystal grains it looked a lot like sand. B was grey and had a very fine power like appearance.
C was white with big crystals mixed in with a few smaller ones. D looked like sugar with a very white colour. E was dark grey with crystals that looked like little rocks. F looked like white salt crystals. G was much the same as F but G had much larger crystals. H was a clear liquid and I was white and looked like sugar.
The next test I did was there conductivity I started with whether they conduct as a solid or not. None of the nine conducted as a solid but obviously I did not test H as a solid because we did not have it. The next test was to see if they conduct in water or turps. D and G both conducted when put in water but none conducted when put into turps.
The next was to see how high there melting point was and whether they conducted as a melt. A had a high melting point and did not conduct as a melt. B had an extremely high melting point and did not conduct as a melt. C had a low melting point and it did not conduct either. D's melting point was medium to high and did conduct as a melt. E had a low melting point and did not conduct F also had a low melting point and did not conduct as a melt.
G however had a high melting point and did conduct as a melt. H's melting point was lower than room temperature and it did not conduct as a melt. I had a low melting point and did not conduct as a melt. The last test was solubility. When I added water to the nine substances D, G, H and I dissolved and when I added turps E dissolved.
After completing all four test I found that A was continuous, B was continuous, c was non-polar, D was Ionic, E was Polar, F was non-polar, G was Ionic, H was Polar and I was polar. SOLUBILITY CONDUCTIVITY M. P. IT IS SUBSTANCE Water Turps Solid Dissolved Liquid A HIGH CONTINUOS B EX-HI CONTINUOS C LOW NON-POLAR D YES YES YES MED IONIC E YES LOW POLAR F LOW NON-POLAR G YES YES YES HIGH IONIC H YES lower than POLAR Room temp I YES LOW POLAR Conclusion/Discussion: Overall I think the experiment was successful. Some materials were hard to find and some more easy. The biggest problem I had was having to share a power pack because sometimes I needed it and could not get which wasted time which was valuable but I managed to get everything done in time.
If I had my time again I would not change anything that I can think of.