Electrolytes (Simplified) Practice Problems

A molecule of a strong electrolyte is shown below. 

Which of the following represents the solution formed from dissolving the strong electrolyte in water?

A non-electrolyte solute shown below is placed in water.

Choose the diagram that represents the solution formed from dissolving the solute.

Consider the weak electrolyte propionic acid (CH₃CH₂COOH) solution. Predict whether it contains only molecules, mostly molecules and a few ions, or only ions.

Potassium sulfite (K₂SO₃) is a strong electrolyte since only K⁺ and SO₃²⁻ ions are present when it is dissolved in water, while sulfurous acid (H₂SO₃) is a weak electrolyte since its aqueous solution consists of mostly H₂O and H₂SO₃ molecules and a few H₃O⁺ and HSO₃⁻ ions. Is this true?

Determine whether an aqueous solution of potassium iodide (KI), a strong electrolyte, will contain mostly molecules and a few ions, only ions, or only molecules.

Show the balanced dissociation equation for the dissolution in water of copper(II) sulfate (CuSO₄), a strong electrolyte.

Predict whether an aqueous solution of maltose (C₁₂H₂₂O₁₁) which is a sugar and a non-electrolyte, will contain mostly molecules and a few ions, only molecules, or only ions.

Determine whether the solute in the following equation is non-electrolyte, strong electrolyte, or weak electrolyte: 

(CH₃)₂NH (aq) + H₂O (l) ⇌ (CH₃)₂NH₂⁺ (aq) + OH⁻ (aq)

Identify the solute in the following as strong, weak, or non-electrolyte when placed in water: Rb₂CO₃ (s) → Rb⁺ (aq) + CO₃²⁻ (aq) 

Which of the following correctly describes an electrolyte?

Classify the following substance as a nonelectrolyte, weak electrolyte, or strong electrolyte in water: CH₃CH₂CH₂OH (propanol)