Analysis
I found that sodium was present in the Mummion crystals. I came to this decision by doing a flame test which showed sodium as the colour orange. I tested the Mummion crystals with the flame test and it gave me the colour orange and by testing all the chemicals I had I came to a decision that sodium was the cations in the Mummion crystals.
Evaluation
I can’t be very certain that sodium is present in the Mummion because we didn’t test every chemical possible. This has a huge impact on my final analysis because it may not be sodium it could be any other chemical I may not have tested. But since I wasn’t able to test these other chemicals I have come to the conclusion that sodium is defiantly present in the Mummion crystals. The flame test could have given me wrong result too because I could have interpreted the colours wrong which may of had an effect on my final result. I may not have cleaned the nichrome rod after each test properly which may have given me inaccurate results. To improve my investigation I could redo theses test accurately to make sure my final results are correct by making sure that the nichrome rod was cleaned properly.
Second Test
Wet test Procedure
To test for the anions present in mummion I will need to do a wet test, the following equipment I need are:
Spatula
Rack of test tubes
Glass rod
Nitric acid
Ammonia solution
Sliver nitrate solution
Barium chloride solution
Hydrochloric acid
Distilled water
Metal salts
I will start by using a spatula to put a little of one of the sample salts into a clean test tube and then add few drops of nitric acid.
If it starts to fizz I will add more nitric acid to generate more gas, where I can let it bubble through lime water to see if it is carbon dioxide.
If the solid hasn’t fully dissolved I will add a bit more nitric acid until it does. Once I’ve done this I will add 3cm depth of distilled water and mix well and pour an equal amount into two test tubes
I will take one test tube of my mixed solution and add some sliver nitrate solution to see if a precipitate forms I will record what colour is formed. I will then add ammonia solution to the same mixture to see whether the precipitate formed dissolves.
I will then take the other test tube and add barium chloride solution to see if a thick white precipitate forms.
If the precipitate turns slightly cloudy I will add a few drops of hydrochloric acid to see if it disappears or not. Then record what I have found on a results table.
I will eventually do the same thing with each sample salts that I have.
Results table
Risk Assessment
Analysis
I found that the anions present in mummion is carbonate and chloride I know this because it was the two that worked the best and gave the same results as the mummion sample . This could mean that my mummion sample was either sodium carbonate or sodium chloride.
Evaluation
My experiments went very well but if I could redo them I would make some changes. For instance I may have put too much of the sample salts which could have given me wrong results to improve this I would measure the sample salts and make sure they all were measured the same. Some of the test I did gave confusing results which I then interpreted it as how I saw it which may have had an impact on my final results to make this better I could redo the test a few times to make sure the right results were given. Overall I think that my experiments were okay and there wouldn’t be any way to make them better.