Answers to Questions
- Because total alkalinity and pH are directly related, if the total alkalinity is too high so is the pH. If the pH is too high, it causes the calcium to become unstable. If the calcium is unstable it will precipitate and cause the water to become cloudy. A levels of pH also makes chlorine an ineffective sanitizer.
- cause (a substance) to be separated in solid form from a solution. too much calcium, unbalanced pH and total alkalinity, temperature is too high
- 2Fe + 3Cl2 --> 2FeCl3
- Some form of chlorine (see Image 7 for different forms) must be added to the pool to start the process. The chlorine added immediately reacts with the water to form free chlorine. The HOCl in the free chlorine will react with any waste (typically containing ammonia) to form a chloramine. The remaining free chlorine will continue to break down the chloramine into hydrogen, nitrogen gas, and liquid water. This completes the sanitization process.
- Ca(OCl)2 + 2H20 --> 2HOCl + 2OH + Ca