Ph Of NaCl: 5 Factors You Should Know!

What is the pH of NaCl?

The pH of NaCl (sodium chloride) is around 7. It is because NaCl is a neutral compound formed by the combination of a strong acid and a strong base.

The pH of NaCl Vs. Other Salts

Name of SaltpH Value
Sodium chloride7
Ammonium chloride4.5 to 6
Potassium bicarbonate8.2
Magnesium chloride5 to 7
Silver nitrate4.3
Copper sulphate4.5
Sodium bicarbonate8.5

How can we measure the pH of NaCl?

We can measure the pH of NaCl by dissolving it in water to create a solution. Then we can measure the pH of the resulting solution using a pH metre or pH indicator strips. Since NaCl is a neutral compound, the pH of the resulting solution will be very close to 7, which is the pH of pure water.

What are the implications of the pH of NaCl?

NaCl is used to adjust the pH of overly acidic or basic solutions. When NaCl is added to an acidic solution, it can neutralise the acid and increase the pH of the solution. Likewise, when NaCl is added to a basic solution, it can neutralise the base and decrease the pH of the solution.

Factors Affecting the pH of NaCl

There are various factors that affect the pH of NaCl. They are

  1. The concentration of NaCl: The pH of a solution of NaCl can vary depending on the concentration of the salt. Higher concentrations of NaCl can increase the pH of the solution.
  2. Temperature: The pH of NaCl solution can be affected by temperature change. At lower temperatures, the pH of the solution may decrease.
  3. Contamination: The pH of a solution of NaCl can be affected by contamination from other substances. For example, if the NaCl solution is contaminated with an alkaline substance, the pH of the solution may increase.
  4. Dissolved gases: The pH of a solution of NaCl can be affected by dissolved gases, like carbon dioxide. Carbon dioxide reacts with water to form carbonic acid, which decreases the solution’s pH.
  5. Presence of other ions: The pH of a solution of NaCl can be affected by the presence of other ions. For example, if the NaCl solution contains hydrogen ions (H+), the pH of the solution may decrease.

About the author

I am Leena Raswant, a chemistry postgraduate. I thrive on challenges and continually specified goals. I aim to learn, unlearn, relearn and spread my knowledge in the best possible ways.

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