1. What is pH Calculation for NaCl Solution?

NaCl (sodium chloride) is a neutral salt formed from a strong acid (HCl) and a strong base (NaOH). When dissolved in water, it undergoes no hydrolysis and produces a neutral solution with pH = 7, regardless of concentration.

2. How Does the Calculator Work?

The calculator uses the principle of neutral salt solutions:

Explanation: NaCl dissociates completely into Na⁺ and Cl⁻ ions in water. Neither ion hydrolyzes with water molecules, so the solution remains neutral with pH = 7.

3. Importance of pH Calculation

Details: Understanding pH of salt solutions is crucial in chemistry, biology, and environmental science. Neutral salts like NaCl maintain the natural pH balance of aqueous systems.

4. Using the Calculator

Tips: Enter the concentration of NaCl solution in mol/L. The calculator will return pH = 7 since NaCl is a neutral salt that doesn't affect pH.

5. Frequently Asked Questions (FAQ)

Q1: Why is NaCl solution always pH 7?
A: NaCl is formed from strong acid (HCl) and strong base (NaOH), so neither cation nor anion hydrolyzes with water, maintaining neutral pH.

Q2: Does concentration affect pH of NaCl solution?
A: No, NaCl solutions remain pH 7 regardless of concentration because it's a neutral salt.

Q3: When would NaCl solution not be exactly pH 7?
A: Only if the water used for dissolution is not pure (pH ≠ 7) or if other substances are present in the solution.

Q4: Are all salt solutions neutral?
A: No, only salts from strong acids and strong bases are neutral. Salts from weak acids or bases can be acidic or basic.

Q5: Why is pH important in salt solutions?
A: pH affects chemical reactions, biological processes, and material stability in solutions containing salts.