Lab 9 PostLab - Titrations 11/25/14, 12:42 PM
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1. 6/6 points | Previous AnswersNCSUGenChem102LabV1 9.POST.01.
Consider a different titrant for this exercise. Suppose Ca(OH)2 were used as the titrant, instead of NaOH.
This will make the titrant twice as concentrated in hydroxide ion. The analyte will still be HC2H3O2.
(a) What is the stoichiometry of HC2H3O2 to Ca(OH)2?
(b) Complete the following table for this titration.
Data Table P1: Titration of acetic acid with calcium hydroxide
concentration of Ca(OH)2 0.364 M
volume vinegar solution 12.04 mL
mass vinegar solution 12.10 g
volume of Ca(OH)2 solution 12.70 mL
mmol of Ca(OH)2 4.62 mmol
Lab 9 PostLab - Titrations (Postlab)
Benton Gorre
CH 102, section 111, Fall 2014
Instructor: Pallavi Singh TA
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Lab 9 PostLab - Titrations 11/25/14, 12:42 PM
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mmol of HC2H3O2 9.24 mmol
mass of HC2H3O2 .554 g
mass % of HC2H3O2 in the original sample 4.58 %
molarity of HC2H3O2 in the original sample .767 M
Additional Materials
Titrations
Periodic Table
2. 6/6 points | Previous AnswersNCSUGenChem102LabV1 9.POST.02.
Consider a different analyte for this exercise. Citric acid is found in many fruits and fruit juices. Sodium
hydroxide (NaOH) is the titrant and citric acid (H3C6H5O7) the analyte according to the following
balanced chemical equation.
H3C6H5O7 + 3 OH− → C6H5O7
3− + 3 H2O
(a) What is the stoichiometry of H3C6H5O7 to OH−?
(b) Complete the following table for this titration.
Data Table P2: Titration of citric acid in orange juice with sodium hydroxide. [Show Less]