How can I make various concentrations of CuSO4?
I know that to make 0.1M you would fill the copper solution up to 10mL in the graduated cylinder and then add water to the rest..but how can you prepare a 0.01M? 0.001? 0.0001?..........using water and graduated cylinder?
I am no chemist but as far as I know copper sulphate is a solid.
If it is in pure solid form and not as a hydrate we can figure out how many grams in a mole
Cu = 63.5
S = 32
4O = 4*16 = 64
total = 159.5 g/mol
so if I put 159.5 grams of it in a liter of water (and it dissolved) I would have 1 M
If I put 15.95 grams in a liter I would have .1 M
If I put 1.595 grams in, I would have .01 M etc
To prepare various concentrations of CuSO4 solutions, you can use a method called serial dilution. This method involves diluting a concentrated solution to obtain solutions with lower concentrations. Here's a step-by-step guide on how to prepare different concentrations of CuSO4 using a water and graduated cylinder:
1. Start with a known concentration of CuSO4, let's assume you have a 1.0M CuSO4 solution.
2. Choose the desired concentration you want to achieve. For example, let's say you want to prepare a 0.01M CuSO4 solution.
3. Calculate the dilution factor needed to obtain the desired concentration. The dilution factor is the ratio of the desired concentration to the starting concentration. In this case, the dilution factor would be 0.01M/1.0M = 0.01.
4. Take a known volume of the starting solution, which will depend on the dilution factor. In this case, since the dilution factor is 0.01, you would take 0.01 times the desired final volume. Let's assume you want to prepare a 100 mL solution, so you would take 0.01 times 100 mL = 1 mL of the 1.0M CuSO4 solution.
5. Transfer the 1 mL of the 1.0M CuSO4 solution to a graduated cylinder.
6. Add water to the graduated cylinder up to the desired final volume. In this case, you would add water to reach a total volume of 100 mL.
7. Mix the solution thoroughly to ensure complete dilution of the CuSO4.
By following this procedure, you can prepare a 0.01M CuSO4 solution using a water and graduated cylinder.
To prepare lower concentrations such as 0.001M or 0.0001M, you would repeat the serial dilution process starting with the 0.01M solution. Each time, you would take a smaller fraction of the previous solution and dilute it to the desired final volume.
For example, for a 0.001M solution, you would take 0.001 times the desired final volume as your starting volume. If you want to prepare a 100 mL solution, you would take 0.001 times 100 mL = 0.1 mL of the 0.01M CuSO4 solution, and then add water to reach a total volume of 100 mL.
Remember to always use clean and calibrated equipment to ensure accurate measurements during the dilution process.