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Determination of the Relative Atomic Mass of Lithium
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| Submitted: Thu Jul 11 2002
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Determination of the Relative Atomic Mass of Lithium Planning Lithium (Li), chemical element of Group 1a in the periodic table, the alkali metal group, lightest of the solid elements. The metal itself -which is soft, white, and lustrous- and several of its alloys and compounds are produced on an industrial scale. Lithium reacts with water at room temperature to produce hydrogen gas and lithium hydroxide. 2Li(s) + 2H2O(l) 2LiOH(aq) + H2(g) If a known mass of lithium is dissolved in water, the volume of hydrogen produced can be used to calculate the relative atomic mass of lithium. This will be the basic thesis for experiment 1. The resulting solution of Lithium hydroxide can be titrated with a known concentration of hydrochloric acid to find its concentration, and this can be used to calculate the relative atomic mass of lithium. This will be the basic thesis for experiment 2. LiOH(aq) + HCl(aq) LiCl(aq) + H2O(l) Experiment 1 1. I...
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