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Thymol Blue as Indicator

Thymol Blue as Indicator. Thymol Blue: Titration of Antacid. This should be what your antacid looks like after you have added an excess of 0.2 M HCl and about 5-10 drops of thymol blue indicator. This should be what your antacid looks like after you have titrated with 0.2 M NaOH.

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Thymol Blue as Indicator

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  1. Thymol Blue as Indicator

  2. Thymol Blue: Titration of Antacid This should be what your antacid looks like after you have added an excess of 0.2 M HCl and about 5-10 drops of thymol blue indicator This should be what your antacid looks like after you have titrated with 0.2 M NaOH

  3. You are adding excess HCl to antacid tablet, then determining how much extra acid is present by titrating with NaOH. • If your solution is not reddish when you add 75 mL of the 0.2 M acid, you will have to add more (make sure you get exact volume!). • It might take a little time to dissolve tablet, after a few minutes you can carefully crush with glass stirring rod. • Do at least two tablets. • You should add a little bit of the 0.2 M NaOH to buret and swish around a bit then discard in waste jug. This is called priming the buret. • You should discard titrations in waste jug as well • Sample calculations are in handout. Other Notes

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