how to make 100 mL of a 0.500 M CuSO4 solution
But how do u calculate it? Everyone knows what to do with mixing it up, how do u calculate?
To make a 100 mL 0.500 M CuSO4 (copper sulfate) solution, you will need to follow these steps:
Step 1: Calculate the Amount of Copper Sulfate Needed
First, determine the molar mass of CuSO4. Copper has a molar mass of 63.55 g/mol, sulfur has a molar mass of 32.06 g/mol, and oxygen has a molar mass of 16.00 g/mol. Thus, the molar mass of CuSO4 is 63.55 + (32.06 × 1) + (16.00 × 4) = 159.61 g/mol.
Next, use the formula:
Moles = (Molarity × Volume) / 1000
Rearrange the equation to solve for moles:
Moles = (0.500 mol/L × 0.100 L) / 1000
Moles = 0.005 mol
Now, use the molar mass to calculate the required amount of CuSO4 (in grams):
Mass of CuSO4 = Moles × Molar mass
Mass of CuSO4 = 0.005 mol × 159.61 g/mol
Mass of CuSO4 = 0.798 g
So, you will need approximately 0.798 grams of CuSO4 for a 0.500 M solution.
Step 2: Dissolve Copper Sulfate in Water
Weigh out 0.798 grams of CuSO4 using a balance. Then, transfer it to a container (such as a beaker or flask). Add a small amount of distilled water to the container and stir it gently to dissolve the CuSO4 completely. Ensure that it dissolves completely without any solid residue.
Step 3: Dilute to 100 mL Final Volume
Once the CuSO4 is fully dissolved, transfer the solution to a volumetric flask using a funnel. Rinse the original container with distilled water to ensure you've transferred all the solution. Then, add distilled water to the volumetric flask until you reach the marked 100 mL line. Use a stirring rod to mix it thoroughly.
Congratulations! You have now made a 100 mL 0.500 M CuSO4 solution. Remember to label the container properly and take necessary safety precautions while handling chemicals.
How many mols do you need? That's mols = M x L = ?
Then mols = grams/molar mass. You know molar mas and mols, solve fo grams. Place that many grams in a 100 mL volumetric flask, add some water and swirl until all of the CuSO4 is dissolved, add DI water to the mark of the volumetric flask, mix thoroughly. Label.