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Questions and Answers
Which of the following is a correct definition of an acid?
Which of the following is a correct definition of an acid?
- An acid is a molecule that accepts electrons
- An acid is a proton donor (correct)
- An acid is a molecule that does not donate protons
- An acid is a proton acceptor
Which of the following is true about strong acids?
Which of the following is true about strong acids?
- They do not dissociate at all
- They only dissociate in the presence of a base
- They dissociate totally (correct)
- They dissociate partially
Which of the following is a correct statement about lactic acid?
Which of the following is a correct statement about lactic acid?
- It does not dissociate at all
- It is a weak acid and its anion is a base (correct)
- It is a strong acid
- Its anion is not a base
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Study Notes
- Lowry and Brønsted definitions of acid and base are relevant to biological systems.
- An acid is a proton donor and a base is a proton acceptor.
- Strong acids, like HCl and H2SO4, dissociate totally.
- OH- ion is a base because it accepts a proton.
- Neutralization occurs when a strong acid and OH- are combined.
- Anions produced by strong acids are not bases.
- Organic acids, like lactic acid, dissociate partially.
- Lactic acid is a weak acid and its anion is a base.
- Ammonium ion is an acid and ammonia is a conjugate base.
- Phosphoric acid and its derivatives can act as both acids and bases.
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