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An Investigation into the Atomic Mass of Lithium.
Member rating: No Rating | Words: | Submitted: Tue Oct 21 2003
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An Investigation into the Atomic Mass of Lithium. There are two methods that can be used to determine the atomic mass of a Group 1 metal. These are best described by the reactions that take place during these methods. Method 1: 2Li(s) + 2H20(l) ==> 2LiOH(aq) + H2 (g) For the first reaction, the equipment must be set up as detailed in the attached sheet. A mass of lithium must be taken and weighed, the results recorded. This mass is then to be added to the test tube, and the bung replaced. As is shown by the reaction for the experiment, a gas (Hydrogen) is released. This hydrogen displaces the water in the cylinder, and can be measured. The equation also shows that there is a relationship between the mass of lithium added to the test tube and the total volume of gas that is released by the reaction. The number of moles of lithium present in...
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