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Question What is the molar concentration of acetic acid in a sample of vinegar Prediction The manufacture of claims on the label that the vinegar contains 50 acetic acid which translates into a 087 molL concentration of acetic acid The concentration of acetic acid in the vinegar sample should be the same Purpose If we add acid solution to basic solution to produce water and salt this activity is called titration It involves carefully adding one solution to another until chemically equivalent amounts react Vinegar is a solution of a weak acid in water This acid will react with the base sodium hydroxide in a 11 molar ratio If a solution of NaOH of known concentration will used titrate vinegar it is possible to determine the amount of acetic acid The main three things from this experiment are to determine the concentration of vinegar to verify the description on the product labels practice the chemical testing technique of titration The balanced chemical equation for the neutralization of acetic acid with NaOH is Safety notes Wear safety glasses and if available NaOH is corrosive to flesh and can cause blindness Wash up spills immediately using large amounts of water Rinse your hands under running water if you come in contact with the NaOH solution Wash your hands upon completion of the lab Materials Lab apron eye protection NaOHaq vinegar Phenolphthalein wash bottle of pure water
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