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Who's Cheating On The Vinegar?
Member rating: No Rating | Words: | Submitted: Fri Jan 09 2004
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Who's Cheating On The Vinegar? Aim: T carry out an investigation to test the strength of vinegar supplied in three various fish and chip shops, so we can find out if it has been watered down, and if so by how much. What Vinegar is: The kind of vinegar you get at the grocery store is about 95% water, but the vinegary part is acetic acid (also called ethanoic acid or methane carboxylic acid). The formula is written: CH3COOH Apparatus: Vinegar samples A, B and C Sodium Hydroxide Phenolphthalein Pipettes Conical Flask Measuring Cylinder Method: 1. Make sure you are wearing safety goggles. 2. Measure out 20mis of each sample of vinegar. 3. Add five drops of phenolphthalein to the 20mls of vinegar sample. 4. Add alkali, sodium hydroxide, to the vinegar solution, 1ml at a time using a pipette. 5. Continue to do this until the mixture of vinegar, phenolphthalein, and sodium hydroxide had created a slightly pink liquid. 6. Do this two more...
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