The answeres to the previous post was not what I am looking for...so please try to help me.....
How can I make various concentrations of CuSO4(this is a blue solution)?
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?
To prepare different concentrations of CuSO4 (copper sulfate) solution using water and a graduated cylinder, you can use a technique called serial dilution. Serial dilution involves diluting a concentrated solution to obtain a desired lower concentration by adding a known quantity of the concentrated solution to a known quantity of solvent (in this case, water).
Here's how you can prepare different concentrations of CuSO4 solution step-by-step:
1. Start with a concentrated solution of CuSO4. Let's assume you have a 1.0M concentration of CuSO4 solution.
2. Determine the volume of the concentrated CuSO4 solution that you will need for the desired dilution. For example, to prepare a 0.1M CuSO4 solution, you will need to dilute the solution by a factor of 10. So, if you want to prepare 10 mL of a 0.1M CuSO4 solution, you will need 1 mL of the concentrated solution (1.0M).
3. Using a pipette or a graduated cylinder, accurately measure the required volume of the concentrated CuSO4 solution (1 mL in this case) and transfer it into a clean container.
4. Add the required volume of water (solvent) to achieve the desired total volume of the diluted solution. In our example, to prepare 10 mL of the 0.1M CuSO4 solution, you would add 9 mL of water to the container.
5. Mix the solution thoroughly by gently swirling or inverting the container several times. Ensure that all the solute is dissolved, and the solution is homogenous.
This will give you a 0.1M CuSO4 solution. To prepare lower concentrations, such as 0.01M, 0.001M, or 0.0001M, you can repeat the same process of serial dilution using the newly prepared solution as the concentrated solution.
For example, to prepare a 0.01M CuSO4 solution starting from the 0.1M solution:
1. Measure and transfer 1 mL of the 0.1M CuSO4 solution to a clean container.
2. Add 9 mL of water to the container to achieve a total volume of 10 mL.
3. Mix the solution thoroughly.
Follow the same procedure for other desired concentrations, adjusting the volumes of the concentrated solution and water accordingly.
Remember to handle chemicals with caution and always wear appropriate personal protective equipment.