Procedure in preparing solution for 250.0 mL of 0.2500M cupric sulfate solution from anhydrous cupric sulfate. Assume
100% purity.
moles cupric sulfate= volume*concentrtion=.250*.25= ???
mass copper sulfate= moles above*molarmassCuSO4
I assume you can figure the molar mass of cupric sulfate by yourself.
mols you want = M x L = 0.25 M x 0.25 L = ?
Then grams = mols CuSO4 x molar mass CuSO4 = ? grams CuSO4
To prepare a solution of 250.0 mL of 0.2500M cupric sulfate from anhydrous cupric sulfate, you need to follow these steps:
Step 1: Calculate the amount of anhydrous cupric sulfate required.
The molar mass of cupric sulfate (CuSO4) is 159.61 g/mol. Since the solution requires a concentration of 0.2500 M, we can use the mole-to-molarity relationship to calculate the moles of cupric sulfate required.
moles of cupric sulfate = Molarity × Volume (in liters)
= 0.2500 mol/L × 0.2500 L
= 0.0625 mol
To convert the moles to grams, we can use the molar mass.
grams of cupric sulfate = moles × molar mass
= 0.0625 mol × 159.61 g/mol
= 9.9763 g
So, you need approximately 9.9763 grams of anhydrous cupric sulfate to prepare the solution.
Step 2: Weigh the required amount of anhydrous cupric sulfate.
Use an analytical balance to accurately weigh out 9.9763 grams of anhydrous cupric sulfate. Ensure that the balance is calibrated and the container used should be clean and dry.
Step 3: Dissolve the anhydrous cupric sulfate.
Transfer the weighed anhydrous cupric sulfate to a suitable container, such as a beaker or flask. Add a small quantity of distilled water to aid in dissolving the cupric sulfate. Stir the solution gently until the cupric sulfate is completely dissolved.
Step 4: Dilute the solution to the desired volume.
Using a volumetric flask or graduated cylinder, add distilled water to the cupric sulfate solution until the final volume reaches 250.0 mL. It is important to accurately measure the volume to ensure the desired concentration is achieved.
Step 5: Mix the solution thoroughly.
Once the desired volume is reached, ensure that the cupric sulfate solution is well-mixed by swirling or gently stirring the flask. This helps to ensure uniformity throughout the solution.
Step 6: Verify the concentration (optional).
If you have access to appropriate laboratory equipment, you can verify the concentration of the cupric sulfate solution using techniques like titration or spectroscopy.
Following these steps, you should now have a 250.0 mL solution with a concentration of 0.2500 M cupric sulfate prepared from anhydrous cupric sulfate.