Strong, Weak, and Non-Electrolytes Quiz

Questions and Answers

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?

NH₃ (correct)

HCl

NaOH

HF (correct)

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?

HCl Signup and view all the answers

What are some examples of strong electrolytes?

HCl, HBr, HI, HClO₄, HNO₃, H₂SO₄, NaOH, KOH Signup and view all the answers

List all nonelectrolytes.

H₂O, CH₃OH, C₂H₅OH, C₁₂H₂₂O₁₁ Signup and view all the answers

Which of the following acids is classified as a weak electrolyte?

HF Signup and view all the answers

What is the definition of weak electrolytes?

Solutes that exist mostly in the form of neutral molecules with a small fraction in the form of ions. Signup and view all the answers

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.

Description

Test your knowledge of strong, weak, and non-electrolytes with this informative quiz. Understand how these substances behave in solution and their role in dissociation when dissolved in water. Perfect for chemistry students looking to reinforce their learning!