Can you write an acid’s formula from its name, or name it from its formula? Test yourself on common acids, from the one in your stomach to the oxyacids of chlorine and bromine, and learn the naming rules chemists use. Every answer comes with a short explanation.

Take your knowledge of acids further: acids in food and medicine, acid rain, industrial chemistry and what makes one acid stronger than another. Apply the naming rules to new elements and discover some surprising chemistry history along the way. Every answer comes with a short explanation.

Can you name an acid just by looking at its formula? Practice the rules behind acid names (prefixes, endings and the salts they form) with acids of chlorine, sulfur, nitrogen and more. Every answer comes with a short explanation.