Ionic and net ionic equations Knowledge-Based Practice

Chemistry · The Mole & Stoichiometry · Chemistry · Chemical Reactions & Equations

5 Chemistry practice questions on Ionic and net ionic equations. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    Which equation represents the balanced net ionic equation for the reaction between solid magnesium and aqueous hydrochloric acid?

    • A) Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)\text{Mg}(s) + 2\text{HCl}(aq) \rightarrow \text{MgCl}_2(aq) + \text{H}_2(g)
    • B) Mg(s)+2H+(aq)→Mg2+(aq)+H2(g)\text{Mg}(s) + 2\text{H}^+(aq) \rightarrow \text{Mg}^{2+}(aq) + \text{H}_2(g)
    • C) Mg(s)+2H+(aq)+2Cl−(aq)→Mg2+(aq)+2Cl−(aq)+H2(g)\text{Mg}(s) + 2\text{H}^+(aq) + 2\text{Cl}^-(aq) \rightarrow \text{Mg}^{2+}(aq) + 2\text{Cl}^-(aq) + \text{H}_2(g)
    • D) Mg2+(aq)+2Cl−(aq)→MgCl2(s)\text{Mg}^{2+}(aq) + 2\text{Cl}^-(aq) \rightarrow \text{MgCl}_2(s)
  2. 2.

    Which equation represents the balanced net ionic equation for the reaction between aqueous acetic acid and aqueous potassium hydroxide?

    • A) CH3COOH(aq)+OH−(aq)→CH3COO−(aq)+H2O(l)\text{CH}_3\text{COOH}(aq) + \text{OH}^-(aq) \rightarrow \text{CH}_3\text{COO}^-(aq) + \text{H}_2\text{O}(l)
    • B) H+(aq)+OH−(aq)→H2O(l)\text{H}^+(aq) + \text{OH}^-(aq) \rightarrow \text{H}_2\text{O}(l)
    • C) CH3COOH(aq)+K+(aq)+OH−(aq)→KCH3COO(aq)+H2O(l)\text{CH}_3\text{COOH}(aq) + \text{K}^+(aq) + \text{OH}^-(aq) \rightarrow \text{KCH}_3\text{COO}(aq) + \text{H}_2\text{O}(l)
    • D) CH3COO−(aq)+K+(aq)→KCH3COO(s)\text{CH}_3\text{COO}^-(aq) + \text{K}^+(aq) \rightarrow \text{KCH}_3\text{COO}(s)
  3. 3.

    When aqueous solutions of barium nitrate and sodium sulfate are mixed, which pair of ions acts as spectator ions?

    • A) Ba2+(aq)\text{Ba}^{2+}(aq) and SO42−(aq)\text{SO}_4^{2-}(aq)
    • B) Ba2+(aq)\text{Ba}^{2+}(aq) and NO3−(aq)\text{NO}_3^-(aq)
    • C) Na+(aq)\text{Na}^+(aq) and NO3−(aq)\text{NO}_3^-(aq)
    • D) Na+(aq)\text{Na}^+(aq) and SO42−(aq)\text{SO}_4^{2-}(aq)
  4. 4.

    Which equation represents the balanced net ionic equation for the reaction that occurs when aqueous solutions of sodium carbonate and nitric acid are mixed?

    • A) Na+(aq)+NO3−(aq)→NaNO3(s)\text{Na}^+(aq) + \text{NO}_3^-(aq) \rightarrow \text{NaNO}_3(s)
    • B) Na2CO3(aq)+2H+(aq)→2Na+(aq)+H2O(l)+CO2(g)\text{Na}_2\text{CO}_3(aq) + 2\text{H}^+(aq) \rightarrow 2\text{Na}^+(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g)
    • C) CO32−(aq)+H+(aq)→HCO3−(aq)\text{CO}_3^{2-}(aq) + \text{H}^+(aq) \rightarrow \text{HCO}_3^-(aq)
    • D) CO32−(aq)+2H+(aq)→H2O(l)+CO2(g)\text{CO}_3^{2-}(aq) + 2\text{H}^+(aq) \rightarrow \text{H}_2\text{O}(l) + \text{CO}_2(g)
  5. 5.

    Which equation represents the balanced net ionic equation for the reaction that occurs when aqueous solutions of iron(III) chloride and sodium hydroxide are mixed?

    • A) Na+(aq)+Cl−(aq)→NaCl(s)\text{Na}^+(aq) + \text{Cl}^-(aq) \rightarrow \text{NaCl}(s)
    • B) FeCl3(aq)+3NaOH(aq)→Fe(OH)3(s)+3NaCl(aq)\text{FeCl}_3(aq) + 3\text{NaOH}(aq) \rightarrow \text{Fe(OH)}_3(s) + 3\text{NaCl}(aq)
    • C) Fe3+(aq)+3Cl−(aq)+3Na+(aq)+3OH−(aq)→Fe(OH)3(s)+3Na+(aq)+3Cl−(aq)\text{Fe}^{3+}(aq) + 3\text{Cl}^-(aq) + 3\text{Na}^+(aq) + 3\text{OH}^-(aq) \rightarrow \text{Fe(OH)}_3(s) + 3\text{Na}^+(aq) + 3\text{Cl}^-(aq)
    • D) Fe3+(aq)+3OH−(aq)→Fe(OH)3(s)\text{Fe}^{3+}(aq) + 3\text{OH}^-(aq) \rightarrow \text{Fe(OH)}_3(s)

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