A hydrochloric acid solution is standardized by titrating with a solution containing 0.2329 g of a primary standard sodium carbonate and then boils to remove carbon dioxide. The end point is reached when 42.87 mL of the acid has been delivered. a) What is a primary standard and give three requirements of a primary standard. b) Calculate the molarity of the acid. c) Sketch a titration curve that would be obtained for the above titration. Indicate pH at the equivalence point. d) Name a suitable indicator that can be used for the above titration.

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Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions
Section4.8: Stoichiometry Of Reactions In Aqueous Solution-titrations
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8. A hydrochloric acid solution is standardized by titrating with a solution containing
0.2329 g of a primary standard sodium carbonate and then boils to remove carbon
dioxide. The end point is reached when 42.87 mL of the acid has been delivered.
a) What is a primary standard and give three requirements of a primary standard.
b) Calculate the molarity of the acid.
c) Sketch a titration curve that would be obtained for the above titration. Indicate
pH at the equivalence point.
d) Name a suitable indicator that can be used for the above titration.
Transcribed Image Text:8. A hydrochloric acid solution is standardized by titrating with a solution containing 0.2329 g of a primary standard sodium carbonate and then boils to remove carbon dioxide. The end point is reached when 42.87 mL of the acid has been delivered. a) What is a primary standard and give three requirements of a primary standard. b) Calculate the molarity of the acid. c) Sketch a titration curve that would be obtained for the above titration. Indicate pH at the equivalence point. d) Name a suitable indicator that can be used for the above titration.
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