Soapy water is a mixture of water and soap, which refers to any liquid detergent or cleaning agent that has been mixed with water. Soap is made from fats or oils combined with an alkali, such as sodium hydroxide or potassium hydroxide. When added to water, the soap molecules surround and lift away dirt, grease, and grime, making it easier to wash them away. The term "soapy water" is commonly used when referring to a solution that has been prepared for cleaning purposes, such as in washing hands or surfaces, or in doing laundry.