Overall Unit 8 Review

Based on the activity series, will this reaction occur?

Ca + Pb(NO₃)₂  →

• Yes
• No

Based on the activity series, will this reaction occur?

Au + NaCl →

• Yes
• No

In balancing chemical equations, we change

• Coefficients
• Subscripts
• Both can be changed

Is this equation balanced?

Al + O₂ → 2Al₂O₃

• Yes
• No

Balance this equation:

__ H₂+ __ O₂→__ H₂O

• 2H₂+ 2O₂→ 2H₂O

• 1H₂+ 2O₂→ 1H₂O

• 2H₂+ 1O₂→ 2H₂O

What is the correct net ionic equation for the following reaction?

Ca²⁺_(aq) +  2Cl^- _(aq) + 2Ag⁺_(aq) +  2NO₃^- _(aq) → 2AgCl_(s) + Ca²⁺_(aq) + 2NO₃^- _(aq)

• Ca²⁺_(aq) +  2NO₃^-_(aq) → Ca(NO₃)_{2 (s)}

• 2Ag⁺_(aq) + 2Cl^- _(aq) → 2AgCl_(s)

• 2Ag + 2Cl →  2AgCl

What is the precipitate in this reaction?

CuCl_{2 (aq)} + 2NaOH_(aq) → Cu(OH)_{2 (s)} + 2NaCl_(aq)  

• NaCl_(aq)

• Na²⁺_(aq) and Cl^1-_(aq)

• Cu(OH)_{2 (s)}

What are the spectator ions in the the following reaction?

3K⁺_(aq) + 3OH^-_(aq) + Fe³⁺_(aq) + 3Cl^-_(aq) → 3K⁺_(aq) + 3Cl^-_(aq) + Fe(OH)_{3 (s)}

• K⁺_(aq) and Cl^-_(aq)

• Fe³⁺_(aq) and OH^-_(aq)

• Fe(OH)_{3 (s)}

What type of chemical reaction is this one?

Cu + 2Ag(NO₃) → 2Ag + Cu(NO₃)

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

What type of chemical reaction is this one?

C + 2H₂ --> CH₄

• Synthesis

• Decomposition

• Single Replacement

• Combustion