Final answer:
Hydrocyanic acid and Cyanogen Chloride are commonly known as blood agents. They are poisonous compounds that can be lethal and have a pronounced effect on the human body's ability to use oxygen effectively.
Step-by-step explanation:
Hydrocyanic acid (HCN) and Cyanogen Chloride (ClCN) are commonly referred to as blood agents due to their toxic effects on human blood and the body's ability to use oxygen. These are poisonous compounds that, in their gaseous state or when dissolved in water, can have significant health implications. Hydrocyanic acid (HCN), when dissolved in water, is referred to as hydrocyanic acid, just as hydrogen chloride gas (HCl) dissolved in water becomes hydrochloric acid. The prefix 'hydro-' is added to the name of the anion, and the last syllable from '-ide' is changed to '-ic acid', as is the case with HCN becoming hydrocyanic acid.
These naming conventions are critical for understanding the behavior of these compounds in aqueous solutions. For instance, cyanide ions (CN-) are weak bases and, when paired with cations like potassium in potassium cyanide (KCN), can react with water to form a basic solution because CN- is the conjugate base of the weak acid HCN. Similarly, Cyanogen Chloride (ClCN) is a compound that can release cyanide ions in certain conditions but is more commonly known in its gaseous form as a chemical warfare agent.