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13. A hydrocholoric acid solution is standardinzed by titrating 0.4541 g of primary stardard tris(hydroxymethyl)aminomethane. If 35.37 mL is required for the titration, what is the molarity of the acid?
15. A sodium hydroxide solution is standardized by titrating 0.8592 g of primary standard potassium acid phthalate to a phenolphthalein end point, requiring 32.67 mL. What is the molarity of the base solution?© BrainMass Inc. brainmass.com April 3, 2020, 4:13 pm ad1c9bdddf
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13. The molar weight of TRIS is 121.14 g/mol. So the moles of 0.4541 g of TRIS is
At the end of the titration, the moles of the two chemicals are equal to each other.
So the molarity of HCl is
The molarity of HCl is 0.10526 M.
15. The molar weight of KHP is 204.2g/mole.
So the moles of 0.8592 g of KHP is
At the end ...
If provides examples of finding the molarity and pH of the solution during the titration process.