Arsenic acids are a group of chemical compounds that contain arsenic, a toxic element. These acids are typically formed when arsenic reacts with oxygen and water, resulting in various arsenic oxoacids. The most common types include arsenic acid (H₃AsO₄) and meta-arsenic acid (HAsO₃). They are often used in industrial applications, such as in the production of glass and pesticides. These acids are important in environmental chemistry, as they can affect soil and water quality. Due to the toxicity of arsenic, understanding arsenic acids is crucial for assessing health risks and developing methods for remediation in contaminated areas.