To raise the chlorine level by the required amount, how much calcium hypochlorite is necessary if 4.0 ppm is needed?

To determine how much calcium hypochlorite is needed to raise the chlorine level in a pool by a specific amount, such as 4.0 parts per million (ppm), it's essential to understand both the chemical characteristics of calcium hypochlorite and the volume of water in the pool.

Calcium hypochlorite is a commonly used chlorine compound for pool sanitation. Its effective concentration can vary, but it typically has around 65% available chlorine. When aiming for a chlorine increase, pool professionals often use a conversion factor to calculate the amount needed based on the pool's volume.

For example, to achieve an increase of 4.0 ppm in a standard-size swimming pool (usually calculated in gallons), it is necessary to know the pool's total volume to make the conversion accurately. A calculation can be performed, where the amount of calcium hypochlorite required directly correlates with how much chlorine is needed (4.0 ppm) and the total water volume.

In this scenario, arriving at the figure of 100 ounces indicates that this precise amount of calcium hypochlorite will contribute the necessary chemical equilibrium required to raise the chlorine level to the desired ppm target, considering the pool's volume. The figures provided in the other options