Which statement about dilution is true?

• A. It Increases Vapor Pressure
• B. You Know the Exact Product
• C. It Should Be Used Only in Unknowns
• D. You Can Dilute Any Liquid

Answer: (B)

Dilution involves lowering the concentration of a chemical by adding a solvent, and the safety takeaway is you should know exactly what you’re diluting. Knowing the exact product lets you check its identity, hazards, and how it will interact with the chosen diluent and with the final mixture. With that knowledge, you can select the right solvent, determine the correct final concentration, plan appropriate ventilation and containment, and ensure proper labeling and SDS review. Without knowing the exact product, dilution can create unexpected reactions, release harmful vapors, or produce a mixture with unknown or greater risk.

The statement about vapor pressure isn’t a reliable rule for dilution in general, and safety practice isn’t about applying dilution to unknowns. Similarly, diluting any liquid isn’t automatically safe or appropriate—some substances react violently with water or other diluents, or have hazards that change when diluted. So the best answer is that you know the exact product, because that knowledge drives safe, effective dilution.