Define what is the concentration of the hno solution

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Reference no: EM13154423

In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 20.75 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink. Instead of starting over, you add 31.25 mL of the acid, and the solution turns colorless. Then, it takes 3.38 mL of the NaOH to reach the end point. (a) What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?

Reference no: EM13154423

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