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An Introduction to Henderson Hasselbalch Equation
Henderson Hasselbalch Equation – Formula: The Henderson Hasselbalch equation is a mathematical formula used to calculate the pH of a solution. The equation is based on the principles of acid-base chemistry. It takes into account the dissociation of acids and bases in solution and the pH of the solution is determined by the ratio of the concentrations of the acid and also base.
Theory for the Henderson Hasselbalch Equation:
The Henderson-Hasselbalch equation is a mathematical formula used to calculate the pH of a buffer solution. The equation is:
pH = pKa + log([A-]/[HA])
where:
- pH is the pH of the buffer
- pKa is the acid dissociation constant of the buffer
- [A-] is the concentration of the anion
- [HA] is the concentration of the acid
- The Henderson-Hasselbalch equation is based on the idea that a buffer solution resists changes in pH. Therefore the equation calculates the pH of a buffer solution by taking into account the concentration of the acid and the concentration of the anion.
Applications of the Henderson Hasselbalch Equation
The Henderson Hasselbalch equation a mathematical formula used to calculate the pH of a solution. Therefore the equation used to calculate the pH of a solution that composed of a weak acid and its conjugate base. The Henderson Hasselbalch equation is also used to calculate the pH of a buffer solution.
More About the Henderson Hasselbalch Equation
Therefore the Henderson-Hasselbalch equation a formula used to calculate the pH of a solution. The equation is:
pH = pK + log ([A-]/[HA])
The Henderson-Hasselbalch equation used to calculate the pH of a solution that made up of a weak acid and its conjugate base. Therefore the pK is the equilibrium constant for the weak acid. The [A-]/[HA] is the concentration of the acid and its conjugate base. The pH is the measure of the acidity or alkalinity of a solution.
Derivation of the Henderson Hasselbalch Equation
The Henderson Hasselbalch equation used to calculate the pH of a buffer solution. Therefore the equation is as follows:
pH = pKa + log ([A-]/[HA])
The equation can derived from the following two equations:
- pH = pKa + log ([A+]/[HA])
- pKa = -log ([A-]/[HA])
Equation 1 can rewritten as:
pH = pKa + log ([A+]/[A-])
Substituting equation 2 into equation 1 gives:
- pH = pKa + log ([A+]/[A-])
- = pKa + log (1)
- pH = pKa
