What does a wettable powder form when mixed with water?

When a wettable powder is mixed with water, it forms a suspension. This is because wettable powders consist of solid particles that do not dissolve in water. Instead, they remain suspended within the liquid medium. This suspension allows the active ingredients in the wettable powder to be evenly dispersed throughout the water, facilitating effective application when used in pest control operations.

In a suspension, the solid particles can be seen floating in the liquid and can settle over time if not agitated. This property is crucial in pest control, as it ensures that the pesticide remains active while being applied, allowing for better coverage and effectiveness against pests.

Other options do not accurately describe the mixture of wettable powder and water. A solution involves the complete dissolution of solute in a solvent, while a gel would imply a much thicker consistency often associated with colloidal systems. An emulsion refers to a mixture of two immiscible liquids, usually where one liquid is dispersed in another, which is not the case with wettable powders and water.