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Questions and Answers
What is the conjugate acid of HCO3-?
What is the conjugate acid of HCO3-?
H2CO3
What is the conjugate base of H2PO4-?
What is the conjugate base of H2PO4-?
HPO4^2-
Which of the following is an Arrhenius acid? (Select all that apply)
Which of the following is an Arrhenius acid? (Select all that apply)
Which of the following is an Arrhenius base? (Select all that apply)
Which of the following is an Arrhenius base? (Select all that apply)
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Which of the following represents a conjugate acid-base pair from the equilibrium NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH−(aq)?
Which of the following represents a conjugate acid-base pair from the equilibrium NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH−(aq)?
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What is the conjugate base of HSO4−?
What is the conjugate base of HSO4−?
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What is the conjugate acid of HPO42−?
What is the conjugate acid of HPO42−?
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Identify as an acid or a base: NH4+
Identify as an acid or a base: NH4+
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Identify as an acid or a base: HCl
Identify as an acid or a base: HCl
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Identify as an acid or a base: hc2h3o2
Identify as an acid or a base: hc2h3o2
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Identify as an acid or a base: KOH
Identify as an acid or a base: KOH
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Write a chemical equation for HCl(aq) showing how it is an acid according to the Arrhenius definition.
Write a chemical equation for HCl(aq) showing how it is an acid according to the Arrhenius definition.
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Write a chemical equation for NH4+(aq) showing how it is an acid according to the Arrhenius definition.
Write a chemical equation for NH4+(aq) showing how it is an acid according to the Arrhenius definition.
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Write a chemical equation for KOH(aq) showing how it is a base according to the Arrhenius definition.
Write a chemical equation for KOH(aq) showing how it is a base according to the Arrhenius definition.
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Write a chemical equation for HC2H3O2(aq) showing how it is an acid according to the Arrhenius definition.
Write a chemical equation for HC2H3O2(aq) showing how it is an acid according to the Arrhenius definition.
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Which of the following solutions is a good buffer system? (Select all that apply)
Which of the following solutions is a good buffer system? (Select all that apply)
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What is the Henderson-Hasselbalch equation?
What is the Henderson-Hasselbalch equation?
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Study Notes
Conjugate Acids and Bases
- Conjugate acid of HCO3- is H2CO3.
- Conjugate base of H2PO4- is HPO4^2-.
- Conjugate base of HSO4- is SO4^2-.
- Conjugate acid of HPO4^2- is H2PO4-.
- Conjugate acid-base pair example: H2O and OH− from the ammonia equilibrium reaction.
Arrhenius Acids and Bases
- H2SO4 is identified as an Arrhenius acid.
- LiOH is an Arrhenius base.
- Notable Arrhenius acids: HCl and HC2H3O2.
- Notable Arrhenius bases: KOH.
Chemical Equations for Arrhenius Definitions
- HCl dissociates in water: HCl(aq) → H+(aq) + Cl−(aq).
- Ammonium ion acts as an acid: NH4+(aq) → H+(aq) + NH3(aq).
- KOH dissociates in water: KOH(aq) → K+(aq) + OH−(aq).
- HC2H3O2 in water: HC2H3O2(aq) + H2O(l) → H3O+(aq) + C2H3O2−(aq).
Buffer Systems
- Effective buffer system example: 0.10 M HC2H3O2 and 0.10 M LiC2H3O2, containing a weak acid and its conjugate base.
Henderson-Hasselbalch Equation
- Formula: pH = pKa + log[base]/[acid].
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Test your knowledge on key concepts from Chemistry II with these flashcards. This quiz covers topics like conjugate acids and bases, and identifies Arrhenius acids. Perfect for quick revision before your exam!
