Which of the following is a key factor in the phosphate program's effectiveness?

The alkalinity of the boiler water is a critical factor in the effectiveness of a phosphate treatment program. Phosphates are used in boiler water treatment to help prevent scaling and corrosion. They react with calcium and magnesium in the water to form insoluble compounds that can be removed from the boiler system.

Maintaining proper alkalinity levels in the boiler water is essential for creating an optimal environment for these reactions to occur. Alkalinity helps to stabilize the pH of the water and influences the solubility of phosphates. If the alkalinity is too low, it can lead to more aggressive conditions that promote corrosion, while excessive alkalinity can cause operational issues and affect the efficiency of phosphate treatment.

Thus, ensuring the correct balance of alkalinity supports the phosphate program's goal of maintaining water quality and protecting the boiler system from damage.