Half Equivalence Point Calculator

Precise Titration Analysis

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Half Equivalence Point Calculator

Calculate pH and volume at half equivalence point.

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Buffer Region Calculator

Calculate buffer region and capacity.

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Titration Point Calculator

Calculate pH at various titration points.

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Understanding Half Equivalence Points

Basic Principles

Key concepts include:

  • Equivalence point
  • Buffer regions
  • pH curves
  • Acid-base equilibria
  • Indicator selection

Titration Curves

Important points:

  • Critical Points:
    • Initial pH
    • Half equivalence
    • Equivalence point
  • Buffer Regions:
    • Maximum capacity
    • pH range

Applications

Common uses:

  • Buffer preparation
  • Endpoint detection
  • pKa determination
  • Quality control
  • Research methods

Advanced Concepts

Additional topics:

  • Gran plots
  • Derivative curves
  • Multiple equilibria
  • Temperature effects
  • Ionic strength

Essential Half Equivalence Formulas

Half Equivalence Point

pH = pKa

Vhalf = Veq/2

[HA] = [A⁻]

Buffer Region

pH = pKa ± 1

Capacity = 0.576Ca

Range = 10-25% to 75-90%

Equivalence Volume

Veq = (CaVa)/Cb

Where:

Ca, Cb = Concentrations

Va = Initial volume