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pH and pOH quiz

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이 집합의 용어 (15)

  • What is the purpose of the pH scale in chemistry?
    The pH scale was invented to convert very small concentrations of H+ and OH- ions into more manageable numbers.
  • What is the typical range of the pH scale under normal conditions?
    The pH scale typically operates within the range of 0 to 14 under normal conditions.
  • Can pH values be less than 0 or greater than 14, and if so, how?
    Yes, pH values can be less than 0 or greater than 14 if the concentration of acid or base is very high.
  • How is pH mathematically defined?
    pH is defined as the negative log of the H+ (or H3O+) concentration.
  • How is pOH mathematically defined?
    pOH is defined as the negative log of the OH- concentration.
  • What is the relationship between H+ concentration and pH?
    H+ concentration equals 10 to the negative pH (H+ = 10^-pH).
  • What is the relationship between OH- concentration and pOH?
    OH- concentration equals 10 to the negative pOH (OH- = 10^-pOH).
  • What pH value classifies a solution as basic?
    A solution with a pH greater than 7 is classified as basic.
  • How do H+ and OH- concentrations compare in a basic solution?
    In a basic solution, the H+ concentration is less than the OH- concentration.
  • What pH value classifies a solution as acidic?
    A solution with a pH less than 7 is classified as acidic.
  • How do H+ and OH- concentrations compare in an acidic solution?
    In an acidic solution, the H+ concentration is greater than the OH- concentration.
  • What pH value classifies a solution as neutral at 25°C?
    A solution with a pH equal to 7 is classified as neutral at 25°C.
  • What is the relationship between pH and pOH in aqueous solutions?
    pH plus pOH equals 14 (pH + pOH = 14) in aqueous solutions.
  • What is the ion product constant for water (Kw) at 25°C?
    Kw equals 1.0 x 10^-14 at 25°C.
  • How do strong acids and bases differ from weak acids and bases in terms of ionization?
    Strong acids and bases completely ionize in water, while weak acids and bases only partially ionize and establish an equilibrium.