Carboxylic acids and esters are one of the most important classes of organic compounds. They are everywhere: * in food (citric acid; vinegar = a solution of acetic acid); * in medicines (aspirin = acetylsalicylic acid); * in fats (triglycerides are esters of fatty acids and glycerol); * in plastics (polyesters); * in biochemistry (transformation of pyruvate through the citric acid cycle); * and even in ants :) (formic acid) Learn structures and trivial names of 50 most important carboxylic acids and their esters and salts. Organic Chemistry Quiz: * Aliphatic saturated acids. * Unsaturated and substituted acids. * Di- and tricarboxylic acids. * Aromatic acids. * pKa values of all acids! Choose the game mode: * Spelling quizzes (easy and hard). * Multiple-choice questions (with 4 or 6 answer options). * Time game (give as many answers as you can in 1 minute). A learning tool: * Flashcards. The app is translated into 8 languages, including English, German, French, and many others. So you can learn the names of the carboxylic acids in any of them.