Net, redox review

Which is the correct net ionic equation for the reaction of AgNO₃ and CaCl₂?

• Ca²⁺(aq) +  2Cl^- (aq) → CaCl(s)
• Ag⁺(aq)  +  Cl^- (aq) → AgCl(s)
• Ag +  Cl  →  AgCl
• Ag⁺  +  Ca²⁺   →Ag₂Ca (s)

Which of the following does NOT form a precipitate?

• Pb(NO₃)₂(aq) + 2KI(aq) →
• Sr(NO₃)_{2 (aq)} + K₂SO_4(aq) →
• AgNO₃(aq) + Na₂S(aq) →
•  Pb(NO₃)₂(aq) + AgNO₃(aq) →

In the reaction
2Ca(s) + O₂(g) → 2CaO(s), calcium is...

• Reduced
• Synthesized
• Oxidized
• None of the above

In the reaction Zn + H₂O → ZnO₂ + H₂ which element is oxidized? 

• Zinc
• Hydrogen
• Oxygen
• None

What is the oxidation number of N in NO₂^-1?

• -3
• +4
• -2
• +3

What is oxidation number of Mn in MnO₂?

• 0
• +2
• -2
• +4

In this equation,
CuCl₂ + NaOH  → Cu(OH)₂ + NaCl
Which product is insoluble?

• copper(II) hydroxide
• sodium chloride
• sodium hydroxide
• copper(II) chloride

Which of these results in formation of a precipitate?

• BaNO₃(aq)  +  NaCl(aq)→
• KNO₃(aq)  +  LiOH(aq)→
• Zn(NO₃)₂(aq)  +  NaOH(aq)→
• NaNO₃(aq)  +  Ba(OH)₂(aq)→

What are the spectator ions in this reaction?
CuCl₂(aq) + NaOH(aq) → Cu(OH)₂(s) + NaCl(aq)
 

• Cu²⁺ and OH^1-
• Na²⁺ and Cl^2-
• Na¹⁺ and Cl^1-
• Na¹⁺ and OH^1-

Identify the complete ionic reaction for products of this reaction: (final answer is not balanced)

HCl + Mg(OH)₂ →

• → MgCl₂ + H₂O_(l)

• → Mg²⁺ + Cl^-1 + H₂O_(l)

• → Mg²⁺ + Cl^-1 + H⁺¹ + O^2-

• → MgCl₂ + H₂O_(l) + CO_2(g)