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Acids, Bases, and Buffers definitions

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  • Acid
    Substance that increases hydrogen ion concentration in solution, often leading to a lower pH and greater reactivity in cellular environments.
  • Base
    Substance that accepts hydrogen ions, often increasing hydroxide ion concentration and resulting in a higher pH in solution.
  • Hydrogen Ion
    Positively charged particle released by acids, responsible for increasing solution acidity and influencing cellular reactions.
  • Hydroxide Ion
    Negatively charged particle associated with bases, capable of combining with hydrogen ions to form water.
  • Hydronium Ion
    Formed when a hydrogen ion interacts with water, contributing to the measurement of acidity in solutions.
  • Strong Acid
    Substance that completely dissociates in solution, releasing all its hydrogen ions and creating a highly acidic environment.
  • Weak Acid
    Substance that only partially dissociates in solution, releasing some hydrogen ions and resulting in moderate acidity.
  • Strong Base
    Substance that fully associates in solution, efficiently accepting hydrogen ions and raising the solution's pH.
  • Weak Base
    Substance that partially associates in solution, accepting some hydrogen ions and causing a mild increase in pH.
  • pH Scale
    Logarithmic measurement system ranging from 0 to 14, indicating the concentration of hydrogen ions in a solution.
  • Neutral pH
    Condition where the concentration of hydrogen and hydroxide ions is balanced, typically represented by a pH of 7.
  • Buffer
    Solution containing weak acids and bases that minimizes pH changes by absorbing or releasing hydrogen ions.
  • Cytosol
    Cellular compartment with a near-neutral pH, providing an optimal environment for most cellular processes.
  • Lysosome
    Organelle with a highly acidic interior, specialized for breaking down and destroying cellular materials.
  • Carbonic Acid
    Weak acid in blood that, together with its conjugate base, helps stabilize pH and maintain physiological balance.