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Chemistry: Acids & Bases Flashcards

7 cards from real AP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the pH of a 0.001 M solution of HCl at 25 °C?

    Answer: 3

    HCl is a strong acid, so [H+] = 0.001 M and pH = -log(0.001) = 3.

  2. According to the Brønsted-Lowry theory, a base is defined as a substance that:

    Answer: Accepts a proton

    A Brønsted-Lowry base is a proton (H+) acceptor.

  3. What is the conjugate base of the bicarbonate ion (HCO3-)?

    Answer: CO3^2-

    Removing a proton from HCO3- yields the carbonate ion CO3^2-.

  4. Which of the following is a diprotic acid?

    Answer: H2SO4

    Sulfuric acid (H2SO4) can donate two protons, making it diprotic.

  5. At 25 °C, the ion product of water Kw equals:

    Answer: 1.0 × 10^-14

    Kw = [H+][OH-] = 1.0 × 10^-14 at 25 °C.

  6. A solution with pOH = 4 has a pH of:

    Answer: 10

    Since pH + pOH = 14, pH = 14 - 4 = 10.

  7. Which substance acts as an amphoteric species, able to behave as both an acid and a base?

    Answer: H2O

    Water can donate a proton (acid) or accept one (base), making it amphoteric.