Diagram: (Imagine a diagram here showing 2+ cations and 1- anions. For example, two large blue circles representing Ca²⁺ and one small red circle representing Cl^-. The ratio should be 2:1)

Answer: The chemical formula of the compound is CaCl₂. This is deduced from the diagram by observing the relative numbers of the ions. There are two calcium ions (Ca²⁺) for every one chloride ion (Cl^-) to ensure the overall charge of the compound is neutral (2 x +2 = 4 and 1 x -1 = -1, so 4 - 1 = 3. Therefore, we need 3 chloride ions to balance the charge. However, the diagram shows only one chloride ion, so the formula is CaCl₂. The positive charge of the calcium ions is balanced by the negative charge of the chloride ions.)

Hydrogen: H₂

Sulfur Dioxide: SO₂

Nitrogen Dioxide: NO₂

Methane: CH₄

Balanced Ionic Equation:

Ca(OH)₂(aq) + 2H⁺(aq) → Ca²⁺(aq) + 2Cl⁻(aq) + 2H₂O(l)

Explanation:

• Ionic Equation: This equation shows the complete dissociation of the ionic compounds into their constituent ions in solution.
• Calcium Hydroxide (Ca(OH)₂): Dissociates into Calcium ions (Ca²⁺) and Hydroxide ions (OH⁻).
• Hydrochloric Acid (HCl): Dissociates into Hydrogen ions (H⁺) and Chloride ions (Cl⁻).
• Spectator Ions: The ions that do not participate in the reaction (Ca²⁺ and Cl⁻) are written as spectator ions.
• State Symbols: State symbols (aq, g, s, l) are included to indicate the state of each species.