The volumes between successive equivalence points in the titration of a polyprotic acid are theoretically equal.  Consider again the titration of citric acid (H3C6H5O7) as in question 1 of the Pre-laboratory Questions where a titration required 15.3 mL of 0.180 M NaOH to reach the first equivalence point.  How many mL of this base would be required so that the titration solution was essentially a solution of sodium citrate (Na3C6H5O7)?    Pre Lab Question 1: Titration of 22.0 mL of a solution of citric acid (H3C6H5O7) required 15.3 mL of 0.180 M NaOH to reach the first equivalence point of the titration.  What is the concentration of the citric acid solution? Answer: 0.125M

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The volumes between successive equivalence points in the titration of a polyprotic acid are theoretically equal.  Consider again the titration of citric acid (H3C6H5O7) as in question 1 of the Pre-laboratory Questions where a titration required 15.3 mL of 0.180 M NaOH to reach the first equivalence point.  How many mL of this base would be required so that the titration solution was essentially a solution of sodium citrate (Na3C6H5O7)? 

 

Pre Lab Question 1: Titration of 22.0 mL of a solution of citric acid (H3C6H5O7) required 15.3 mL of 0.180 M NaOH to reach the first equivalence point of the titration.  What is the concentration of the citric acid solution?

Answer: 0.125M
 
 

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