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Find the Ar of lithium.
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| Submitted: Tue Oct 14 2003
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Evaluation. Was my experiment suitable? My experiments enabled me to gain results, which then with the aid of calculations I could find the Ar of lithium. From this perspective you can say the experiment was suitable as I achieved this. Were my results what I expected? Looking at the results they do not match the expected Ar of lithium (6.9). Method 1, measuring the volume of hydrogen produced, gave the result of 19.76 (a factor of 12.86 out). Method 2, titrating the lithium hydroxide produced, gave the result of 8.65 (a factor of 1.75 out). So looking at these results not only we can see they are out, but one method is more inaccurate than the other. The titration is far more accurate than the collecting of gas. Comparing both methods, and recognising sources of error. Method1. Sources of error in the collection of gas practical were: When the lithium was weighed I had to...
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