27.0 mL of 0.11 M HCl is added to 0.57 g of commerical antacid. Some, not all, of the added acid is neutralized by the antacid. Phenolphthalein is added, and the solution remains colorless because of the excess acid that has not been neutralized. the solution is tirtared with 9.7 mL of 0.09 M NaOH to a faint pink endpoint. if an entie tablet of this antacid has a mass of 1.37 g, how many moles of HCl will be neutralized by one tablet of this antacid?

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Nelly StrackeLv2

30 May 2019

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4. A 0.201 g sample of antacid is dissolved in water, and then 50.0 mL of 0.100 M HCl is added so that the solution is acidic. The excess HCl is then titrated with 0.0883 M NaOH to the equivalence point. The back titration requires 20.33 mL to reach the endpoint.

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d. How many moles of HCl were neutralized by the antacid?

e. What is the effectiveness of the antacid (in mol HCl neutralized/g antacid)?

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