Using the mole ratio for the neutralization reaction, determine the number of moles of citric acid in 10.0 mL of pineapple juice.

Question

wolfe8 · Answer

Welcome to OpenStudy. I'm assuming this is part of a bigger question?

anonymous · Answer

yes

wolfe8 · Answer

We need more info than the volume of pineapple juice to answer this. What are you given?

anonymous · Answer

A 10.0-mL sample of pineapple juice was titrated with .100M sodium hydroxide solution. The average volume of NaOH required to reach the endpoint was 12.8 mL.

wolfe8 · Answer

Ah ok so can you write out the formulas for sodium hydroxide and citric acid?

anonymous · Answer

no

wolfe8 · Answer

Hmm you can look them up. Wanna try again?

anonymous · Answer

no idkno idk

wolfe8 · Answer

http://lmgtfy.com/?q=citric+acid http://lmgtfy.com/?q=sodium+hydroxide

anonymous · Answer

C6H8O7 NaOH

wolfe8 · Answer

Yup. So in neutralization, 1 H+ needs 1 OH-. Each citric acid will give 1 H+ and each NaOH will give 1 OH- Therefore the amount of citric acid needed is equal to the amount of NaOH (ratio 1:1). So the number of moles of citric acid in that pineapple juice will be the same as the number of moles of NaOH used. number of moles = concentration*volume