What volume will be needed to make 100 ml solution of 6M orthophosphoric acid?

Answer 1

To prepare a 100 mL solution of 6M orthophosphoric acid (H₃PO₄), you need to determine the amount of concentrated acid required. Assuming you have concentrated H₃PO₄, which typically has a molarity of around 14.7M, you can use the dilution formula: (C_1V_1 = C_2V_2). Rearranging gives (V_1 = \frac{C_2V_2}{C_1} = \frac{6 , \text{M} \times 100 , \text{mL}}{14.7 , \text{M}} \approx 40.82 , \text{mL}). Therefore, you would need approximately 40.82 mL of concentrated H₃PO₄ and dilute it with water to reach a final volume of 100 mL.