thes ests 1. Distinguish between the terms endpoint and equivalence point. For a
ID: 1040750 • Letter: T
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thes ests 1. Distinguish between the terms endpoint and equivalence point. For a weak acid titrated with a strong base, where does the pH a) At the equivalence point. b) At the half-equivalence point. c) At the beginning of the titration. 2. pK.? analyzed your unknown acid and you have determined your pK, to be 7.70. When ook for acids with 3. You have pKa values within: looking at the list of possible acids, you should l a) ± 0.5 pH units b) t 1 pH unit c) t2 pH units d) Any value is acceptable, it's molar mass that matters most. 4. You have analyzed your unknown acid and you have determined the molar mass from the potentiometric titration to be 129.2 g/mol. When looking at the list of possible acids, you should look for acids with molar mass values within: a) 15 g/mole b) ±1 g/mole c) t25 g/mole d) Any value is acceptable, it's pKa that matters mostExplanation / Answer
Ans1 : Equivalence point : It is the point reached when the amount of titrant that is added is perfectly neutralized the analyte and there will be not any excess of titrant and not any analyte unreacted .
End point : It is the point we assigned when titration ends . At the end point , colour of indicator is changed like phenolphthalein changes its colour from colourless to pink .
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