what occurs when there are oh- ions in a solution?
Best Answer: An increase of acid occurs when there are OH- ions in a solution. The hydroxide ion is a diatomic anion with chemical formula OH. It consists of an oxygen and a hydrogen atom held together by a covalent bond, and carrying a negative electrical charge. There are always at least some hydroxide ions in a water solution due to the ionic equilibrium. If more hydroxide ions are added from another source, the hydronium ion concentration will decrease. For solutions which are neither extremely acidic or basic, pH is a convenient measure to use.