A condensation reaction can sometimes release as a product a molecule of water. We sometimes speak of synthesis by dehydration. This is, for example, the case for two monosaccharides, such as glucose or fructose, which can condense into a disaccharide (sucrose) via dehydration synthesis. The reverse reaction is then hydrolysis, the water recombining with the two hydroxyl groups, the disaccharide being converted back into two monosaccharides.
The substance that would be added in order to reverse the reaction would be any substance that is found in the product side. Adding a substance that tends to be a product will shift the equilibrium of the system and will allow the reaction to produce the substances that is found in the reactant side.
List of large volcanic eruptions in the 21st century VEI Volcano (eruption). Country 2 Mount Sinabung Indonesia 4 Kelud Indonesia 3 Mount Ontake Japan 4 Calbuco Chile 23 more rows
