Determine the volume of 2 M NaOH needed to completely react with the products of the hydrolysis of 0.1 moles of phosphorus trichloride.
- 100 ml
- 200 ml
- 400 ml
- 250 ml
📝 Detailed explanation
PCl₃ + 3H₂O → H₃PO₃ + 3HCl.H₃PO₃ is a dibasic acid.
HCl is monobasic.
Total H⁺ = (0.1 × 2) + (0.1 × 3) = 0.5 mol.
Volume NaOH = 0.5 / 2 = 0.25 L = 250 ml.