Certified Pool Operator Practice Test

The addition of Trichlor Tables to a swimming pool has what effect on the pH level?

1. Increases pH

2. Lowers pH

3. No effect on pH

4. Stabilizes pH

The correct answer is: Increases pH

Trichlor Tables, also known as trichloroisocyanuric acid (C3Cl3N3O3), are commonly used as a disinfecting agent for swimming pools. When added to a pool, they release both chlorine and cyanuric acid. The chlorine helps to kill bacteria and algae, while the cyanuric acid acts as a stabilizer to prevent the chlorine from being broken down by sunlight. However, the release of chlorine also leads to an increase in the pH level of the pool. This is because chlorine is a strong oxidizer and can react with water to form hypochlorous acid, which is acidic in nature. As a result, the addition of Trichlor Tables to a swimming pool will increase the overall pH level, making it more basic. Therefore, the correct answer is A Increases pH. The other options are incorrect because: - B: Lowers pH - This is incorrect because, as mentioned, the addition of Trichlor Tables will actually increase the pH level of the pool. - C: No effect on pH - This is incorrect because Trichlor Tables do have an effect on the pH level of a pool, as explained above. - D: Stabil