Yes, K2SO4, also known as potassium sulfate, is soluble in water. When it is added to water, it dissociates into its constituent ions: potassium ions (K+) and sulfate ions (SO42-). This solubility is due to the strong interactions that these ions have with water molecules, which allows them to disperse evenly throughout the solution.
Potassium sulfate is often used in agriculture as a fertilizer because of its beneficial properties for plants. Its solubility means that it can readily provide potassium and sulfur, two essential nutrients, to plants through their root systems. This makes K2SO4 a popular choice for crops that require these elements for optimal growth.