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pH Formula for Strong Base NaOH:
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The pH calculation for NaOH (sodium hydroxide) solutions is based on the strong base dissociation principle. NaOH completely dissociates in water, producing hydroxide ions (OH⁻) that determine the solution's pH.
The calculator uses the pH formula for strong bases:
Where:
Explanation: For strong bases like NaOH, the pH is calculated from the hydroxide ion concentration, which equals the base concentration due to complete dissociation.
Details: Accurate pH calculation is essential for chemical reactions, industrial processes, laboratory experiments, and understanding the basicity of NaOH solutions in various applications.
Tips: Enter the concentration of NaOH solution in mol/L. The value must be valid (concentration > 0). The calculator will compute the corresponding pH value.
Q1: Why is the pH formula different for strong bases?
A: Strong bases completely dissociate in water, making the hydroxide ion concentration equal to the base concentration, which simplifies the pH calculation.
Q2: What is the pH range for NaOH solutions?
A: NaOH solutions are basic with pH values greater than 7. The pH increases with increasing concentration, typically ranging from 8-14 for common concentrations.
Q3: How accurate is this calculation?
A: This calculation provides a good approximation for dilute solutions. For highly concentrated solutions, activity coefficients and other factors may need consideration.
Q4: Can this formula be used for other strong bases?
A: Yes, this formula applies to all strong bases that completely dissociate in water, such as KOH, LiOH, and Ca(OH)₂ (considering stoichiometry for divalent bases).
Q5: What are typical NaOH concentrations used?
A: Common concentrations range from 0.1 M to 10 M in laboratory settings, with pH values approximately 13-15 respectively.