To make a 1/5 dilution of a 10.0 M NaCl solution with a final volume of 1 mL, you will need to measure 0.1 mL of the 10.0 M NaCl solution and add enough diluent (water) to reach the desired final volume.
To make a 1/5 dilution of a 10.0 M NaCl solution with a final volume of 1 mL, we need to mix the NaCl solution with a diluent (such as water) to achieve the desired concentration.
1. Determine the dilution factor:
The dilution factor is the ratio of the final volume to the initial volume. In this case, the final volume is 1 mL and we want a 1/5 dilution, so the initial volume can be calculated as follows:
Initial volume = Final volume × Dilution factor
Initial volume = 1 mL × 5 = 5 mL
2. Calculate the volume of the NaCl solution needed:
To achieve the desired concentration, we need to calculate the volume of the 10.0 M NaCl solution that contains the amount of NaCl required for the dilution.
Moles of NaCl needed = Initial volume × Desired final concentration
Moles of NaCl needed = 5 mL × (1/5) M = 1 mmol
Since the initial concentration is 10.0 M, we can use the following equation to calculate the volume:
Moles of solute = Molarity × Volume
Volume = Moles of solute / Molarity
Volume = 1 mmol / 10.0 M = 0.1 mL
Therefore, you will need to measure 0.1 mL of the 10.0 M NaCl solution.
3. Add the diluent:
Transfer the 0.1 mL of the 10.0 M NaCl solution to a container, then add enough diluent (water) to reach the desired final volume of 1 mL. This will result in a 1/5 dilution of the NaCl solution.