Ozone is more stable in water when the water has which condition?

Ozone is more stable in water when the water has which condition?

• A. low alkalinity
• B. high alkalinity
• C. high temperatures
• D. low oxygen levels

Answer: (B)

Ozone stability in water depends on how pH is buffered. Ozone tends to decompose more quickly when pH changes, so having a water with strong buffering capacity helps keep the pH steadier during ozonation. High alkalinity provides that buffering, preventing pH from rising or dropping in ways that would accelerate ozone breakdown. With this buffering, ozone remains in its molecular form longer and stays active longer, making it more stable in the water. In contrast, water with low alkalinity can experience larger pH shifts that speed up ozone loss, while high temperatures also accelerate ozone decay.

Ozone stability in water depends on how pH is buffered. Ozone tends to decompose more quickly when pH changes, so having a water with strong buffering capacity helps keep the pH steadier during ozonation. High alkalinity provides that buffering, preventing pH from rising or dropping in ways that would accelerate ozone breakdown. With this buffering, ozone remains in its molecular form longer and stays active longer, making it more stable in the water. In contrast, water with low alkalinity can experience larger pH shifts that speed up ozone loss, while high temperatures also accelerate ozone decay.