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Determining the concentration of a limewater solution by volumetric analysis The best way to determine the concentration of a solution is by a titration, and as limewater (Ca(OH)2(aq)) is a base an acid/base titration would be most useful: Ca(OH)2(aq) + 2HCl(aq) 2H2O(l) + CaCl2(l) Precautions to take: working with chemicals, e.g. corrosive hydrochloric acid, means goggles should be worn as well as an apron to protect clothes and care must be taken in handling them, e.g. phenolphthalein is flammable. To get make accurate measurements of fluid bring to eyelevel and measure from the meniscus. To ensure that this test is fair there is only one dependent variable, the amount of titrant used. Using the same volumes of other chemicals throughout in an accurate way and keeping the surrounding conditions the same with a thermostat in the room also maintains a fair test as well as accurate results. The first thing to do is to dilute the...

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