Question

You are titrating 20.00 ml of citric acid (C₆H₈O₇) solution with 0.256 M sodium hydroxide solution. Initially, you filled the buret to 15.46 ml with NaOH titrant solution. The titration end point was reached when the buret read 44.39 ml. What is the concentration of the citric acid solution?

Answer 1

To determine the concentration of the citric acid solution, we need to use the equation (number of moles of NaOH) / (volume of citric acid solution) = (number of moles of citric acid) / (volume of NaOH solution). We can calculate the number of moles of NaOH used by subtracting the initial and final buret readings and using the molarity of NaOH solution. Then, we can calculate the number of moles of citric acid and solve for the concentration of the citric acid solution.

Step-by-step explanation:

To determine the concentration of the citric acid solution, we can use the equation:

(number of moles of NaOH) / (volume of citric acid solution) = (number of moles of citric acid) / (volume of NaOH solution)

First, we need to calculate the number of moles of NaOH used:

(volume of NaOH solution) = (final buret reading) - (initial buret reading)

(number of moles of NaOH) = (Molarity of NaOH solution) * (volume of NaOH solution)

Next, we can calculate the number of moles of citric acid:

(number of moles of citric acid) = (number of moles of NaOH) / 3

Finally, we can solve for the concentration of the citric acid solution:

(concentration of citric acid solution) = (number of moles of citric acid) / (volume of citric acid solution)