1. What Is The pH Calculation For NaOH Solution?

This calculator determines the pH of a solution containing 2g of sodium hydroxide (NaOH) dissolved in a given volume of water. NaOH is a strong base that completely dissociates in water, making the pH calculation straightforward.

2. How Does The Calculator Work?

The calculator uses the formula:

Where:

• \( 2 \) — Mass of NaOH (g)
• \( 40 \) — Molecular weight of NaOH (g/mol)
• \( V \) — Volume of solution (L)
• \( \frac{2}{40} \) — Moles of NaOH
• \( \frac{\frac{2}{40}}{V} \) — Concentration of OH⁻ ions (mol/L)

Explanation: The formula calculates the hydroxide ion concentration and then determines pH using the relationship pH = 14 + log[OH⁻].

3. Importance Of pH Calculation

Details: Accurate pH calculation is essential for chemical reactions, biological systems, industrial processes, and laboratory experiments where precise pH control is required.

4. Using The Calculator

Tips: Enter the volume of solution in liters. The volume must be greater than zero. The calculator will compute the pH based on 2g of NaOH dissolved in the specified volume.

5. Frequently Asked Questions (FAQ)

Q1: Why is NaOH considered a strong base?
A: NaOH completely dissociates in water to produce Na⁺ and OH⁻ ions, resulting in a high concentration of hydroxide ions and a basic pH.

Q2: What is the molecular weight of NaOH?
A: The molecular weight of NaOH is 40 g/mol (Na=23, O=16, H=1).

Q3: How does volume affect the pH?
A: As volume increases, the concentration of OH⁻ decreases, resulting in a lower pH (less basic) solution.

Q4: What pH range is expected for NaOH solutions?
A: NaOH solutions are strongly basic, typically with pH values ranging from 12 to 14 depending on concentration.

Q5: Are there limitations to this calculation?
A: This calculation assumes complete dissociation, ideal conditions, and no other ions affecting the pH. It may not be accurate for very concentrated solutions where activity coefficients differ from 1.