Practical investigations
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I am doing my planning for my chemistry course work and I don’t know what indicator to use to determine the concentration of ethanoic acid in a sample of vinegar by titration against a standard solution of sodium hydroxide.
Igloo says
Ethanoic acid is a weak acid, whereas sodium hydroxide is a strong base, so the appropriate indicator to use is phenolphthalein. The theory is covered in the Nuffield Advanced Chemistry Students’ Book in Topic 14, pages 342-343.
Phenolphthalein is colourless in acidic solutions and red/pink in alkaline solutions, so the end point is sharp and relatively easily obtained.
Risk assessment
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For further guidance see our tutorial on Risk Assessment.
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this information is amazing thnk you
sandra 12 October 2007
updated: 09 December 2004
