Adding liquid chlorine to pool water will have what effect on pH?

Adding liquid chlorine to pool water affects the pH primarily because liquid chlorine, which is typically sodium hypochlorite, has a high pH itself (around 12-13). When this chemical is introduced into the pool water, it can lead to a temporary increase in the overall pH level of the pool.

When chlorine is added, it reacts with water and can lead to the formation of hypochlorous acid. While this acid can lower the pH, the overall effect of the liquid chlorine's high pH means that, as it is added, it tends to raise the pH of the pool water over time.

Understanding these properties is crucial for pool operators, as maintaining the correct pH is essential for effective sanitation, swimmer comfort, and overall water balance. Regular testing and balancing of pool chemicals ensure that the pH remains within the ideal range, typically between 7.2 and 7.8. This information helps operators anticipate and manage changes in water chemistry when adding liquid chlorine.