Adding sodium bicarbonate to raise pH will primarily affect which parameter?

Adding sodium bicarbonate to raise pH will primarily affect which parameter?

• A. Dissolved oxygen
• B. Conductivity
• C. pH
• D. Nitrite

Answer: (C)

Raising pH with a buffering agent works by altering the hydrogen ion activity in the solution. Sodium bicarbonate dissociates into bicarbonate ions that participate in the carbonate buffering system. When added, these bicarbonate ions neutralize some of the free hydrogen ions, shifting the equilibrium and reducing H+ concentration, which increases pH. That direct change in hydrogen ion activity is why pH is the primary parameter affected. You might notice secondary effects, like a rise in conductivity because more ions are present in the solution, but the main, immediate effect of adding sodium bicarbonate is to raise pH. Dissolved oxygen is governed mainly by temperature and gas exchange, not pH, and nitrite levels are controlled by microbial processes and chemistry that aren’t directly and instantly changed by this buffering step.

Raising pH with a buffering agent works by altering the hydrogen ion activity in the solution. Sodium bicarbonate dissociates into bicarbonate ions that participate in the carbonate buffering system. When added, these bicarbonate ions neutralize some of the free hydrogen ions, shifting the equilibrium and reducing H+ concentration, which increases pH. That direct change in hydrogen ion activity is why pH is the primary parameter affected.

You might notice secondary effects, like a rise in conductivity because more ions are present in the solution, but the main, immediate effect of adding sodium bicarbonate is to raise pH. Dissolved oxygen is governed mainly by temperature and gas exchange, not pH, and nitrite levels are controlled by microbial processes and chemistry that aren’t directly and instantly changed by this buffering step.