Redox Reactions and Net Ionic Equations

The last step in balancing the redox reaction using oxidation-number change method is check the balancing for both atoms and charge.

• True

• False

Tags

NGSS.HS-PS1-7

Considering the following precipitation reaction: Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) What is the correct complete ionic equation?

• Pb²⁺ + (NO₃)₂^- + 2K⁺ + 2I^- → PbI₂(s) + 2K⁺ + 2NO₃^-

• Pb²⁺ + 2NO₃^- +2K⁺ + I^- → PbI₂(s) + 2K⁺ + NO₃^-

• Pb²⁺ + 2NO₃^- + 2K⁺ + 2I^- → PbI₂(s) + 2K⁺ + 2NO₃^-

• Pb²⁺ + 2NO^3- + 2K⁺ + 2I^- → Pb²⁺ + 2I^- + 2K⁺ + 2NO₃^-

Tags

NGSS.HS-PS1-2

What is the net ionic equation for the reaction between K₃PO_{4 (aq)} and CuSO_{4 (aq)}?

• 2 K⁺_(aq) + SO₄^2-_(aq) → K₂SO_{4 (s)}

• K⁺_(aq) + SO₄^2-_(aq) → KSO_{4 (s)}

• 2 Cu²⁺_(aq) + 3 PO₄^3-_(aq) → Cu₃(PO₄)_{2 (s)}

• Cu²⁺_(aq) + PO₄^3-_(aq) → CuPO_{4 (s)}

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In a net ionic equation, this compound, HNO₂

• will stay together

• will break apart

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 substance is oxidized in the following reaction? 
Fe⁺² + MnO₄  → Fe⁺³ + Mn⁺²   

• Fe⁺²

• Mn⁺³

• Mn⁺²

• MnO₄

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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)

Tags

NGSS.HS-PS1-7

Hydrogen sulfide gas is bubbled through a solution of potassium hydroxide; what is the net ion equation?

• H⁺ + OH^- --> H₂O

• H₂S + OH ^- --> H₂O + S^2-

• no rxn

• H₂S + KOH ->H₂O + K₂S

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

NGSS.HS-PS1-7

A solution of sulfuric acid is added to a solution of barium hydroxide; What is the net ionic equation?

• H₂SO₄ + Ba²⁺ + OH^- -->BaSO₄ + H₂O

• H⁺ + OH^- --> H₂O

• H₂SO₄ + Ba²⁺ + OH^- -->Ba²⁺+ SO₄ ^2-+ H₂O

• H⁺ + SO₄^2- + Ba²⁺ + OH^- -->BaSO₄ + H₂O

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7