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The pH Scale definitions

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  • pH Scale
    A numerical range, typically 0 to 14, used to express acidity or basicity by converting small ion concentrations into manageable values.
  • Acidic Solution
    A mixture where the concentration of hydrogen ions exceeds that of hydroxide ions, resulting in a value less than 7.
  • Basic Solution
    A mixture where the concentration of hydroxide ions exceeds that of hydrogen ions, resulting in a value greater than 7.
  • Neutral Solution
    A mixture where hydrogen ion and hydroxide ion concentrations are equal, typically corresponding to a value of 7 at 25°C.
  • Hydrogen Ion Concentration
    The amount of H+ present in a solution, determining its acidity and calculated as 10 to the negative value.
  • Hydroxide Ion Concentration
    The amount of OH- present in a solution, determining its basicity and calculated as 10 to the negative value.
  • pOH
    A value expressing the basicity of a solution, found by taking the negative logarithm of hydroxide ion concentration.
  • Kw
    A constant representing the product of hydrogen and hydroxide ion concentrations in water, equal to 1.0 x 10^-14 at 25°C.
  • Negative Logarithm
    A mathematical operation used to convert small ion concentrations into more practical numbers for comparison.
  • Strong Acid
    A substance that completely dissociates in water, resulting in a high hydrogen ion concentration and a low value.
  • Strong Base
    A substance that completely dissociates in water, resulting in a high hydroxide ion concentration and a high value.
  • Weak Acid
    A substance that only partially dissociates in water, producing a lower hydrogen ion concentration compared to a strong counterpart.
  • Weak Base
    A substance that only partially dissociates in water, producing a lower hydroxide ion concentration compared to a strong counterpart.
  • H3O+
    A hydrated form of hydrogen ion, interchangeable with H+ when expressing acidity in aqueous solutions.
  • Ion Product of Water
    The equilibrium constant for water's self-ionization, linking hydrogen and hydroxide ion concentrations.