All acids contain hydrogen in their formula. When dissolved in water the acid dissociates into H+ ions and negative ions. A strong acid releases all of its H+ ions into the solvent, wheras a weak acid only partially dissociates. Most organic acids are weak acids. The equilibrium sign is used to show that the reaction is incomplete. Metal oxides, hydroxides, carbonates and ammonia are classified as bases. A base neutralises an acid to form a salt. An alkali is a base that can dissolve in water, releasing OH- ions into the solution. When acid is neutralised by metal carbonates or hydrocarbonates, the products are a salt and water. When an acid and alkali react in a solution, they dissociate before reacting. The ionic equation is H+(aq) + OH-(aq) --> H2O(l). When an acid is neutralised by a metal carbonate, the products are a salt, water, and carbon dioxide.
Comments
No comments have yet been made