Although their name makes them sound dangerous or toxic, carboxylic acids are found throughout nature in things such as citric acid, vinegar, and even in your DNA. Through detailed readings, discussions, and answering questions throughout the lesson, pupils learn about aldehydes, ketones, and carboxylic acids. How to name these compounds, their physical and chemical properties, their methods of preparation, and their importance are the key components of the 29th part in a series of 36.