Redox Reactions in Basic Conditions

The reaction between Zn and NO₃^- produces Zn(OH)₄^2- and ______.

To balance the charge in the reaction, electrons ______ are added.

The first half-reaction involves Zn and ______.

In the second half-reaction, NO₃^- reacts with water and ______.

To convert the reaction from acidic to basic, sufficient ______ is added.

The balanced equation shows that ______ moles of zinc are needed.

The final balanced equation includes 6 moles of ______ to balance the reaction.

The combined reaction indicates the formation of ______ in the product side.

The number of negative charges on the left side of the equation is represented as ______.

The first step in balancing is writing 2 ______ equations for half reactions.

Identifying Oxidation and Reduction Species

The given reaction: Zn + NO₃^- → Zn(OH)₄^2- + NH₃ is a redox reaction occurring in basic aqueous conditions

Balancing Redox Reactions in Basic Solutions

The process involves breaking the overall reaction into two half-reactions, one for oxidation and one for reduction.
Balance all elements except hydrogen and oxygen by inspection in each half-reaction.
Balance oxygen atoms by adding water molecules (H₂O).
Balance hydrogen atoms by adding protons (H⁺).
Convert the reactions to basic conditions by adding hydroxide ions (OH^-) to both sides to neutralize all H⁺ ions.
Combine the H⁺ and OH^- ions to form water molecules (H₂O) and place the water on one side of the equation.
Balance the charge in each half-reaction by adding electrons (e^-).
Multiply each half-reaction to equalize the number of electrons in both reactions.
Combine the half-reactions, canceling out common species on both sides of the equation to obtain the balanced overall redox reaction.

Balancing the Redox Reaction

The oxidation half-reaction: Zn + 4OH^- → Zn(OH)₄^2- + 2e^-
The reduction half-reaction: NO₃^- + 6H₂O + 8e^- → NH₃ + 9OH^-
The balanced redox reaction: 4Zn + 7OH^- + NO₃^- + 6H₂O → 4Zn(OH)₄^2- + NH₃

Checking the Balanced Reaction

Ensure all elements and charges are balanced.

Explore the processes of identifying oxidation and reduction species in redox reactions, particularly in basic aqueous solutions. This quiz will guide you through balancing these reactions step-by-step, ensuring a clear understanding of the conversion of half-reactions into balanced equations.