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13 Dec 2019

Calculate the back titration with 0.75 g of Al(OH)3 + 22 mL of 1.5M HCl (analyte), and 1M NaOH (titrant).

The indicator turned color after 24.7 mL of NaOH was added to the solution.

The balanced equation is 3HCl + Al(OH)3 = AlCl3 + 3H2O (all in aqueous solution)

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Collen Von
Collen VonLv2
16 Dec 2019

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b. Is the indicator generally added to the titrant or theanalyte in a titration?



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b. What is the secondary standard used in this experiment?De%uFB01ne secondary standard.



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top opening of the buret? Explain.



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c. How is a %u201Chalf-drop%u201D of titrant dispensed from aburet?



5. In Part A.1, a 4-g mass of NaOH is dissolved in 5 mL ofwater. In Part A.3, a 4-mL aliquot of this solution is dilutedto

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6. a. A 0.397-g sample of potassium hydrogen phthalate, KHC8H4O4(molar mass = 204.44 g/mol) is dissolved with 50

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phenolphthalein, what is the molar concentration of the nitricacid solution?

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