Chemistry 30

How do i do this question??

A 10.00ml Sample was taken from a 2Liter Container of Tropicana Orange juice. This sample was analyzed for its citric acid content by titration with a known 0.1112M NaOH base solution. A Phenoolphthalein indicator was added to detect the endpoint for the titration. a pink endpoint colour was observed after 23.75ml of the NaOH soultion was added to the Orange juice solution.

1) Calculate the # moles of NaOH used to reach the end point

is 1ml of NaOH equal to 1 gram???
is 0.593796 the right answer??

2) Calculate the # moles of citric Acid at the endpoint

Where do i start to solve this???

THANKYOU

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