Certified Ophthalmic Assistant Practice Exam

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An alkaline solution has a pH greater than

The correct answer is: 7

An alkaline solution, also referred to as a basic solution, is one that has a pH greater than 7. The pH scale ranges from 0 to 14, with 7 being considered neutral. A pH below 7 indicates acidity, while a pH above 7 indicates alkalinity. The more the pH exceeds 7, the more alkaline the solution becomes. This characteristic is essential in various chemical and biological contexts, including those relevant to ophthalmology, where knowing the pH of solutions can impact the comfort and safety of ocular treatments. Therefore, the correct response indicates the threshold at which a solution transitions from neutral to alkaline.