Tartaricacid, H 2 C 4 H 4 O 6 hastwo acidic hydrogens. The acid is often present

Question

Tartaricacid, H2C4H4O6 hastwo acidic hydrogens. The acid is often present in wines andprecipitates from solution as the wine ages. A solution containingan unknown concentration of the acid is titrated with NaOH. Itrequires 22.65 mL of 0.3500 M NaOH solution to titrateboth acidic protons in 60.00 mL of the tartaric acidsolution. 1) Write a net ionic balanced equation for the neutralizationreaction. 2)Calculate the molarity of the tartaric acid solution. Tartaricacid, H2C4H4O6 hastwo acidic hydrogens. The acid is often present in wines andprecipitates from solution as the wine ages. A solution containingan unknown concentration of the acid is titrated with NaOH. Itrequires 22.65 mL of 0.3500 M NaOH solution to titrateboth acidic protons in 60.00 mL of the tartaric acidsolution. 1) Write a net ionic balanced equation for the neutralizationreaction. 2)Calculate the molarity of the tartaric acid solution.

Explanation / Answer

2NaOH(aq) + H2C4H4O(aq) ---> 2H2O(l) + Na2C4H4O6(aq) Net ionic Equation : H+ +OH-   -----> H2O (l)
N = Normality of NaOH = Molarity * acidity                                       = 0.35 * 1=0.35 N V = Volume of NaOH = 0.02265 mL N' = Normality of tartaric acid = Molarity *basicity                                               = M' * 2 V' = Volume of tartaric acid = 0.06 mL NV = N'V' N' = NV / V'      = 0.132125 N M' = 0.132125 / 2= 0.0660625 M

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