Determination of the relative atomic mass of lithium. - page 2
Keywords: Experiment evaluationrelative atomic mass lithium accuracy results
By Jenny on 02/07/2009
Level: A Level (Year 13)
Page Number: 2 of 2 pages: 1 2
would be by using a larger amount of lithium so 0.02 g was a smaller percentage of it. However using an amount of lithium large enough to minimise this error would mean a very large amount of gas being produced which would be difficult to collect and which would require a large measuring cylinder which would have a correspondingly large error.
A more practical method would be to use a more sensitive balance. A balance that weighed accurately to the third decimal place would only have an error of +/- 0.002 g.
This would give a smaller % error of 1.82 % ((0.002 / 0.11) x 100 = 1.82 %).
Last 5 comments…
There have been no comments posted for this article, but you need to register if you want to be the first!