Final answer:
To prepare 100 ml of a 1000 ppm copper sulfate solution, 100 mg of copper sulfate is needed.
Step-by-step explanation:
To calculate how much copper sulfate (CuSO4) is needed to prepare 100 ml of a solution with a concentration of 1000 ppm (parts per million), use the formula:
solute(g) × 106 / solution (mL)
One ppm is equivalent to 1 mg of solute per liter (L) of solution. Therefore, 1000 ppm would be 1000 mg/L. Since the question asks for a 100 mL solution, multiply the desired ppm by the volume of the solution in liters:
1000 mg/L × 0.1 L = 100 mg of copper sulfate
Thus, 100 mg of copper sulfate is required to prepare 100 ml of a 1000 ppm solution.