In a titrationThe gradual addition of one solution to another until the chemical amount of one reactant being added matches stoichiometrically the amount of another reactant in the solution initially present., the minimum volume of titrant that must be added to cause a sudden change in a physical propertyA characteristic of a material that can be measured without changing the material's chemical composition. (such as color of an indicatorA substance for which a physical property (such as color) changes abruptly when the equivalence point is reached in a titration., pHA logarithmic measure of the concentration of hydrogen (hydronium) ion; pH = -log10([H+]) or pH = -log10([H3O+])., conductivity, or absorbanceA measure of the quantity of light that does not pass through a sample. Absorbance is the negative lograrithm of the transmittance. Transmittance is the fraction of incident light that passes through a sample. In the visible region of the spectrum, absorbance occurs when a material uses the energy from light to change the energy level of the material's electrons. Because different materials have different electronic energy states, they absorb light of different wavelengths.). The end pointIn a titration, the minimum volume of titrant that must be added to cause a sudden change in a physical property (such as color of an indicator, pH, conductivity, or absorbance). The end point should match the equivalence point as closely as possible should match the equivalence pointThe point in a titration at which the amount of one reactant being added stoichiometrically matches the amount of another reactant initially present. The end point should match the equivalence point as closely as possible. as closely as possible
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