1. What is NaOH Normality?

Normality (N) is a measure of concentration equal to the gram equivalent weight per liter of solution. For NaOH, normality equals molarity because each mole of NaOH provides one equivalent of OH⁻ ions.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Molarity \) — Concentration in moles per liter (mol/L)
• \( 1 \) — Factor for NaOH (1 equivalent per mole)

Explanation: Since NaOH has one reactive hydroxide group per molecule, its normality is numerically equal to its molarity.

3. Importance of Normality Calculation

Details: Normality is particularly important in acid-base chemistry as it accounts for the number of reactive units in solution, making it useful for titration calculations.

4. Using the Calculator

Tips: Enter the molar concentration of your NaOH solution in mol/L. The calculator will output the normality in eq/L (which will be numerically identical for NaOH).

5. Frequently Asked Questions (FAQ)

Q1: Why is normality equal to molarity for NaOH?
A: Because NaOH has only one hydroxide group (OH⁻) that can react with acids, so each mole provides exactly one equivalent.

Q2: When would normality differ from molarity?
A: For compounds like H₂SO₄ (which has 2 acidic protons) or Ca(OH)₂ (which has 2 hydroxide groups), normality would be 2× molarity.

Q3: Is normality still commonly used?
A: While molarity is more commonly used today, normality remains important in acid-base chemistry and titrations.

Q4: What are typical NaOH solution normalities?
A: Common standard solutions include 0.1N, 0.5N, and 1.0N NaOH for titrations.

Q5: How should I store NaOH solutions?
A: In airtight containers to prevent absorption of CO₂ from air which can affect concentration over time.