Chemistry Challenge: Calculating Grams of Phosphoric Acid
How many grams of phosphoric acid were in the solution?
Given data: 325 ml of a 5.50 m phosphoric acid solution
Answer:
Grams of phosphoric acid in the solution = 175.18 g
To calculate the grams of phosphoric acid in the solution, we need to follow these steps:
Step 1: Convert Volume to Liters
325 ml ÷ 1000 = 0.325 L
Step 2: Calculate Moles of Phosphoric Acid
Moles of H3PO4 = 5.50 mol/L × 0.325 L = 1.7875 mol
Step 3: Convert Moles to Grams
Grams of H3PO4 = 1.7875 mol × (3 × 1.008 g/mol + 30.974 g/mol + 4 × 16.00 g/mol) = 175.18 g
Therefore, there were 175.18 grams of phosphoric acid in the solution.