Now, Iranian bases are those substances that increase oh concentration in water. So for example, let's look at sodium Hydroxide. Sodium Hydroxide, when mixed with water, dissociates into sodium in an oh ion. And that means it increases the concentration of our oh ions found in water. Therefore, this guide by the submission must be an Iranius base. Now, Arrangeous Aspen bases are always found in water that's by definition, whenever we talk about our radius acid bases, we talk about solutions in which our solvent is water.