In a titration, 15.5 g of oxalic acid was dissolved in a flask and neutralized with 31.2 mL of NaOH. Determine the molarity of the NaOH. Hint: Primary standards (like oxalic acid, here) incude water in their formula. As a result, they do not absorb atmospheric water. Oxalic acid has the chemcial formula: H2C2O4⋅2H2O (so be sure to include the 2 extra water molecules).

Chemistry: Principles and Practice
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Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
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Chapter12: Solutions
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Problem 12.107QE
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In a titration, 15.5 g of oxalic acid was dissolved in a flask and neutralized with 31.2 mL of NaOH.  Determine the molarity of the NaOH.                                                                                          

Hint: Primary standards (like oxalic acid, here) incude water in their formula.  As a result, they do not absorb atmospheric water.  Oxalic acid has the chemcial formula: H2C2O4⋅2H2O (so be sure to include the 2 extra water molecules).

a. 8.33 M

b. 3.55 M

c. 7.88 mol/L

d. 0.333 mol/L

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