Question

To lower the PH what may be added to the swimming pool?

A) Hypochlorite acid
B) Muriatic Acid
C) Sodium chloride
D) Soda ash

Answer 1

To lower the pH in a swimming pool, muriatic acid (hydrochloric acid, HCl) can be added. This substance is diluted and then used to decrease the pH by increasing the concentration of hydronium ions in the water.

Step-by-step explanation:

To lower the pH in a swimming pool, muriatic acid may be added. Muriatic acid, also known as hydrochloric acid (HCl), is a common choice for adjusting pool pH levels. When the pool's pH is too high, indicating the water is too basic, the addition of muriatic acid increases the concentration of hydronium ions, thereby decreasing the pH. It is important to dilute the acid before adding it to the pool to ensure safety and to achieve the desired pH balance. On the contrary, if you need to increase the pH, substances like soda ash (sodium carbonate) are used because they can raise pH by decreasing the concentration of hydrogen ions in the water.

Answer 2

To lower the pH in a swimming pool, muriatic acid (hydrochloric acid) should be added. This is the substance commonly used for this purpose.

Step-by-step explanation:

To lower the HP of a swimming pool, one would typically add muriatic acid (hydrochloric acid) to the water. Muriatic acid is widely used for cleaning pools because it efficiently decreases the pH level of the water, thereby adjusting it to the ideal pH, which is around 7.2. Hypochlorite acid could lower pH, but it is primarily used as a disinfectant rather than for pH adjustment. Sodium chloride does not significantly impact pH and is more commonly known as table salt. Soda Ash (sodium carbonate) is actually used to increase the pH of pool water if it is too acidic, which is the opposite effect of what is needed in this scenario.

In summary, the correct addition to lower the pH in a swimming pool would be B) muriatic acid