Final answer:
To make a 0.144 M sodium phosphate solution in a 300 mL volumetric flask, you would need to add 7.484 grams of solid sodium phosphate.
Step-by-step explanation:
To prepare a 0.144 M sodium phosphate solution in a 300 mL volumetric flask, you need to calculate the amount of solid sodium phosphate to add.
The formula for sodium phosphate is Na3PO4. To find the mass of sodium phosphate, you can use the formula:
Mass = Molarity x Volume x Molar Mass
Let's calculate the mass of sodium phosphate:
Mass = 0.144 M x 0.300 L x (3 Na + 1 P + 4 O)
Mass = 0.144 M x 0.300 L x (3 x 22.99 g/mol + 1 x 30.97 g/mol + 4 x 16.00 g/mol)
Mass = 0.144 M x 0.300 L x 163.92 g/mol
= 7.484 g
Therefore, you need to add 7.484 grams of solid sodium phosphate to the 300 mL volumetric flask to prepare a 0.144 M solution.