Answer:
The key steps to making a solution of a certain concentration are:
1. Determine the desired concentration: The first step in making a solution of a certain concentration is to determine what the desired concentration is. This will depend on the specific application of the solution.
2. Calculate the amount of solute needed: Once you know the desired concentration, you need to calculate the amount of solute (the substance being dissolved) that you need to add to the solvent (the liquid used to dissolve the solute) to achieve the desired concentration. This calculation depends on the molecular weight and purity of the solute.
3. Measure out the solute: After calculating the amount of solute needed, measure out the exact amount of solute required using a laboratory balance or other accurate measuring device.
4. Add the solute to the solvent: Carefully pour the measured solute into the solvent while stirring gently. It is important to dissolve the solute completely in the solvent.
5. Verify the concentration: Once the solute has been completely dissolved in the solvent, verify the final concentration by measuring it using appropriate laboratory instruments such as a spectrophotometer or titration apparatus. If necessary, adjust the concentration by adding more solute or solvent until the desired concentration is achieved.
6. Label and store the solution: Finally, label the solution with its identity, concentration, date of preparation, and any other relevant information. Store the solution according to appropriate guidelines for the particular type of solution, such as refrigeration or storage in a dark location.