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Questions and Answers
Which of the following describes strong electrolytes?
Which of the following describes strong electrolytes?
- Solutions made by molecules that do not conduct electricity
- Substances that partially dissociate into ions in solution
- Substances that mostly remain as neutral molecules in solution
- Substances that completely dissociate into ions when dissolved in water (correct)
Which of the following are examples of weak electrolytes?
Which of the following are examples of weak electrolytes?
- NH₃ (correct)
- HCl
- NaOH
- HF (correct)
What is a nonelectrolyte?
What is a nonelectrolyte?
- A substance that does not dissociate and does not conduct electricity (correct)
- A strong acid that fully dissociates
- An ionic compound that dissolves in water
- A compound that dissociates into ions in water
What is the chemical formula for hydrochloric acid?
What is the chemical formula for hydrochloric acid?
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What are some examples of strong electrolytes?
What are some examples of strong electrolytes?
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List all nonelectrolytes.
List all nonelectrolytes.
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Which of the following acids is classified as a weak electrolyte?
Which of the following acids is classified as a weak electrolyte?
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What is the definition of weak electrolytes?
What is the definition of weak electrolytes?
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Study Notes
Electrolytes Overview
- Electrolytes are substances that dissociate into ions in water and conduct electricity.
Strong Electrolytes
- Complete dissociation into ions in solution.
- Examples include:
- HCl (hydrochloric acid)
- HBr (hydrogen bromide)
- HI (hydrogen iodide)
- HClO₄ (perchloric acid)
- HNO₃ (nitric acid)
- H₂SO₄ (sulfuric acid)
- NaOH (sodium hydroxide)
- KOH (potassium hydroxide)
- All soluble ionic compounds
Weak Electrolytes
- Exist primarily as neutral molecules, with only a small fraction as ions.
- Examples include:
- CH₃CO₂H (acetic acid)
- HF (hydrofluoric acid)
- NH₃ (ammonia, also a weak base)
- HCN (hydrogen cyanide)
Non-Electrolytes
- Do not dissociate in solution and do not conduct electricity.
- Common examples:
- H₂O (water)
- CH₃OH (methanol)
- C₂H₅OH (ethanol)
- C₁₂H₂₂O₁₁ (sucrose)
Summary Lists
- Strong Electrolytes: HCl, HBr, HI, HClO₄, HNO₃, H₂SO₄, NaOH, KOH
- Weak Electrolytes: CH₃CO₂H, HF, HCN, NH₃
- Nonelectrolytes: H₂O, CH₃OH, C₂H₅OH, C₁₂H₂₂O₁₁
Key Concepts
- Strong electrolytes facilitate electrical conduction in solutions.
- Weak electrolytes provide limited ionization and thus lower conductivity.
- Nonelectrolytes dissolve in water without ion formation, leading to non-conductive solutions.
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