Answer:
To calculate the number of moles of sodium hydroxide (NaOH) in a titration, you need to know the concentration of the NaOH solution and the volume used in the titration.
First, you need to convert the volume used from milliliters (mL) to liters (L) by dividing it by 1000. Let's say the volume used is 25 mL, so 25 mL = 25/1000 L = 0.025 L.
Next, you can use the formula:
moles of NaOH = concentration of NaOH (mol/L) × volume of NaOH solution (L)
Let's say the concentration of NaOH solution is 0.1 mol/L, you can substitute these values into the formula:
moles of NaOH = 0.1 mol/L × 0.025 L = 0.0025 moles
Therefore, the number of moles of sodium hydroxide in the titration is 0.0025 moles.