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Determination of the relative atomic mass of Lithium The aim of this experiment is to determine the relative atomic mass of Lithium using two methods. The first method is to measure the volume of hydrogen gas produced when a known mass of lithium reacts with water. The second method is to titrate the solution of lithium hydroxide produced from the first method. Below indicates an image in which shows the relative atomic mass of lithium. This image was taken from the website: http://www.nrc-cnrc.gc.ca/education/elements/images/elements/lithium_e.gif The information below is taken from the website http://www.chemguide.co.uk/physical/acidbaseeqia/indicators.html. It states 'Phenolphthalein is another commonly used indicator for titration's, and is another weak acid. In this case, the weak acid is colourless and its ion is bright pink. Adding extra hydrogen ions shifts the position of equilibrium to the left, and turns the indicator colourless. Adding hydroxide ions removes the hydrogen ions from the equilibrium, which tips to the...

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