Flame test
To find the first part of the name of the chemical you have to do a flame test. A flame test is used to indentify the names of the metal by the colour that is produces.
- Use a wire called nichrome so that the wire does not produce colour to the flame
- dip a nichcrome wire into the hydrochloride acid to clean it
- dip it in to a metal powder and place it in the Bunsen burner
- see the colour it makes
Negative ion
The second part of finding the name you have to do a negative ion. Negative ion shows the chemical that is use.
Testing for alcohol
Another way to find out a name of a chemical is to test if it is an alcohol. Alcohol are a group of chemical that are made of carbon, hydrogen and oxygen
- Get a solution
- Add a drop of sodium dichromate (VI)
- place it in a Bunsen burner
- If the solution turns orange to green it is an alcohol.
When trying to find the mass of each chemical you need to times the mass of each elements with the number of each element there are present.
C mass = 12
H mass = 1
O mass = 16
When using the mass spectroscopy to determine which alcohol is present is to use a graph that shows all the mass of the alcohol and then look at the end of the graph to find the real mass of the alcohol
Result:
Alcohol test:
Flame test:
Why I did not test for sample C?
I did not test for sample C because we had found out the sample was a alchol so there was no need to test it again.
Negative ion
Chromotagraphy
We then tested what pen was used when labelling the bottle
Conclusion
Looking at my conclusion I found out that sample A was a potassium iodide and sample B was a sodium suphate. I also found out that pen 1 was use to lable the bottles. . When trying to determine which alcohols were in sample c we used the spectroscopy. We found out that it was an ethanol. Are result was pen 1 was used.
Evaluation
I think that my result was what i expected. Whiles doing my experiment i followed all the procedures and made sure that i did all the experiment the best of my ability, but there were somet thing that were wrong in the procedures was that whiles heating the test tube for the alcohol, it is was very hard to find the change between the colour. Also it was hard to see the colour different in the flame for example when i was testing bottle B the colour look like orange – red so i did not know the different between sodium or lithium. In the experiment i tryed to see the colour clearly and try to see what the colour represent, therefore i can see what the first part of the name of the 2 bottles.
In the experiment, i would like to improve the result because parts of was difficult to see what type of chemical, metal or alcohol it is.
The adjustment that i would make use more reliable equipement like a measuring cylinder to make sure that my measuring is checked and that there is no mistake and that i will get the right result at the end .
