Final answer:
To calculate the number of moles of NaOH + ions in 100 ml of 0.2 M Na₃PO₄, you multiply the concentration of Na₃PO₄ by the volume of the solution.
Step-by-step explanation:
To determine the number of moles of NaOH + ions in the solution, we need to use the given information about the concentration of Na₃PO₄ and the volume of the solution.
First, we need to convert the volume of the solution from milliliters to liters. 100 mL is equal to 0.1 L.
Next, we can calculate the number of moles of NaOH + ions using the formula:
moles = concentration x volume
moles = 0.2 M x 0.1 L = 0.02 moles.
Therefore, there are 0.02 moles of NaOH + ions in 100 mL of 0.2 M Na₃PO₄.