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Chemistry Coursework Stephanie Knowles Determination of the Relative Atomic Mass of Lithium Analysing: We followed the plan set to us and, for method one, attempted capturing the hydrogen gas produced by the reaction of lithium and water. We decided to do this four times to gain more reliable results, and to identify any anomalies. On our first attempt we used 0.10g of lithium, this amount produced 90cm³ of hydrogen gas, on our second attempt we used 0.9g of lithium, which produced 130cm³ of hydrogen. At this point it was clear that there was a mistake as bigger quantities of lithium would have reacted more, producing more gas, or at least the amount should have been around the same as our first attempt. On the third try we used 0.13g of lithium- this reaction caused 230cm³ of gas to be collected. Making the conclusion that one of our 0.9g or 0.10g of...

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