Alkalis are a group of chemical compounds that can neutralize acids. They are typically soluble in water and produce hydroxide ions (OH⁻) when dissolved. Common examples of alkalis include sodium hydroxide (NaOH) and potassium hydroxide (KOH). These substances are often used in cleaning products and industrial processes due to their ability to break down fats and oils. In the context of the pH scale, alkalis have a pH greater than 7, indicating their basic nature. They can react with acids to form salts and water, a process known as neutralization. Alkalis play a crucial role in various applications, including agriculture, where they help adjust soil pH for better crop growth.