Relier Pairs Acid/Base VocabularyVersion en ligne Match the image of the Acid/Base vocabulary to the correct definition. par Katie Staples 1 This is an ionic compound composed of a cation from a base and an anion from an acid. 2 This is an acid that contains only two different elements: hydrogen and one other atom. 3 This is an acid that is a compound of hydrogen, oxygen, and a third element, usually a nonmetal. 4 This is the reaction of an acid and a base to form water molecules. 5 This is an acid that has only a few molecules split into ions. 6 This is a substance that increases the concentration of hydroxide ions, OH-, in aqueous solution. 7 This is a chemical compound that increases the concentration of hydrogen ions, H+, in aqueous solution. 8 This is an acid that completely splits into ions in water.