Question

molecular formula citric acid2.A 10.0 mL sample of pineapple juice was titrated with 0.100 M sodium hydroxide solution. The average volume of NaOH required to reach the endpoint was 12.8 mL. a.Calculate the number of moles of sodium hydroxide required to reach the endpoint. Show your work in equation editor. Remember to use units and report your answer to the proper number of significant figures.

Answer 1

Answer: The number of moles of sodium hydroxide required to reach the endpoint is 0.00128

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}$      

Molarity of $NaOH$ solution = 0.100 M

Volume of  $NaOH$  solution = 12.8 mL

Putting values in equation, we get:

$0.100M=\frac{\text{Moles of}NaOH\times 1000}{12.8ml}\\\\\text{Moles of }NaOH=\frac{0.100mol/L\times 12.8}{1000}=0.00128mol$

Thus the number of moles of sodium hydroxide required to reach the endpoint is 0.00128