Calculate The Value of Ecell for The Following Reaction 2au

Introduction

The standard cell potential (Ecell) is a measure of the voltage of a galvanic cell under standard conditions. It's calculated using the standard reduction potentials of the half-reactions involved in the overall reaction.

For the reaction 2Au + 3H₂SO₄ → 2Au₂(SO₄)₃ + 3H₂, we need to know the standard reduction potentials of the half-reactions that make up this overall reaction.

Formula

The standard cell potential is calculated using the formula:

Where:

• Ecell is the standard cell potential (V)
• Ered is the standard reduction potential of the reduction half-reaction (V)
• Eox is the standard oxidation potential of the oxidation half-reaction (V)

For the given reaction, we need to identify the half-reactions and their standard potentials.

How to Use the Calculator

1. Enter the standard reduction potential (Ered) in volts
2. Enter the standard oxidation potential (Eox) in volts
3. Click the "Calculate" button
4. The calculator will display the standard cell potential (Ecell)

Example Calculation

Let's calculate the Ecell for the reaction 2Au + 3H₂SO₄ → 2Au₂(SO₄)₃ + 3H₂.

First, we need to identify the half-reactions:

1. Oxidation half-reaction: Au → Au³⁺ + 3e⁻ (Eox = +1.692 V)
2. Reduction half-reaction: H₂SO₄ + 3e⁻ → SO₄²⁻ + 2H⁺ (Ered = +0.68 V)

Using the formula:

The standard cell potential for this reaction is -1.012 V.