QAL Laws & Regulation Practice Exam

When mixing a tank solution containing different formulations, which should be added last?

1. Water-soluble concentrates

2. Wettable powders

3. Suspension products

4. Emulsifiable concentrates

The correct answer is: Emulsifiable concentrates

When mixing a tank solution with various formulations, emulsifiable concentrates should be added last to ensure proper mixing and performance of the solution. Emulsifiable concentrates contain active ingredients that require thorough mixing with water to form a homogeneous emulsion. Adding them last allows for a more effective interaction with the other formulations already in the tank. The order of mixing is crucial for achieving the best results. If emulsifiable concentrates are added too early, they may not mix well with the other ingredients, potentially leading to separation or inadequate dispersion. By adding them last, you ensure that they come into contact with the other ingredients in their most fluid state, encouraging a stable emulsification process. Water-soluble concentrates, wettable powders, and suspension products often need to be incorporated into the solution first to create a stable mixture. Adding emulsifiable concentrates at the end acts as a final step that helps encapsulate and disperse the previously mixed components effectively. Therefore, adding emulsifiable concentrates last helps maintain the integrity and functionality of the entire tank mix.