Why are dilutions performed?

Why are dilutions performed?

• A. To purify the solvent.
• B. To reach the desired concentration.
• C. To decrease the volume of solvent.
• D. To check color.

Answer: (B)

Dilutions are performed to bring a sample to a concentration that can be accurately measured or used in a reaction. Stock solutions are often too concentrated for reliable quantification or for the assay to proceed properly, so adding solvent lowers the amount of solute per volume while keeping the total amount of solute the same. This is why the dilution equation C1V1 = C2V2 is used—to plan the exact factor needed to reach the desired concentration. In practice, diluting makes the signal fall within the detector’s linear range and standardizes samples for comparability, while also conserving reagents. Purifying solvent, decreasing solvent volume, or simply checking color aren’t the goals of dilution.

Dilutions are performed to bring a sample to a concentration that can be accurately measured or used in a reaction. Stock solutions are often too concentrated for reliable quantification or for the assay to proceed properly, so adding solvent lowers the amount of solute per volume while keeping the total amount of solute the same. This is why the dilution equation C1V1 = C2V2 is used—to plan the exact factor needed to reach the desired concentration. In practice, diluting makes the signal fall within the detector’s linear range and standardizes samples for comparability, while also conserving reagents. Purifying solvent, decreasing solvent volume, or simply checking color aren’t the goals of dilution.