A titration of 10.00 mL of an unknown NaOH(aq) solution with 0.250 M HCl is dete

Question

A titration of 10.00 mL of an unknown NaOH(aq) solution with 0.250 M HCl is detected using phenolphthalein. The 0.250 M HCl solution is the titrant. How is this endpoint detected? (What should you observe?) Select one:

a. One drop of HCl turns solution pink but it subsequently returns to colorless.

b. The end point is when first pink color appears.

c. One drop of HCl turns solution colorless but it subsequently returns to pink.

d. One drop of HCl turns solution pink and it remains pink.

e. One drop of HCl turns solution colorless and it remains colorless.

Explanation / Answer

e. One drop of HCl turns solution colorless and it remains colorless.

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