Phosphoric acid is commonly supplied as an 85% solution. What mass of this solution would be required to prepare 600.0 mL of a 2.80 M phosphoric acid solution?
You would need to use 194 g of the 85 % H₃PO₄.
You must make the following conversions:
Volume of dilute acid → moles of H₃PO₄ → mass of H₃PO₄ → mass of 85 % H₃PO₄
0.6000 L dil. acid ×