The indicator constant of phenolphthalein is approximately 10^-10. A solution is prepared by adding 100.01 c. c. of 0.

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Q 2683212147.     The indicator constant of phenolphthalein is approximately 10^-10. A solution is prepared by adding 100.01 c. c. of 0.01 N sodium hydroxide to 100.00 c. c. of 0.01 N hydrochloric acid. If a few drops of phenolphthalein are now added, what fraction of the indicator is converted to its coloured form?
A

2/3

B

3/4

C

1/2

D

9/11

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