What Happens in a Redox Reaction with Zinc and Copper Sulfate?

TL;DR

In a redox reaction with zinc and copper sulfate, zinc loses electrons and is oxidized, while copper gains those electrons and is reduced to solid copper. This reaction results in a clear zinc sulfate solution and a precipitate of solid copper.

Transcript

So what we have here is a solution of a copper sulfate. And copper sulfate is an ionic compound. The copper loses two electrons to the sulfate. So the copper has a positive 2 charge, and the sulfate has a negative 2 charge. This is a cation. This is an anion. So you could imagine it's very easy to dissolve it in a polar solvent like water. So this ... Read More

Key Insights

• 💦 Copper sulfate, an ionic compound, easily dissolves in water due to the polar nature of the solvent.
• 😚 The redox reaction between copper sulfate and zinc results in copper gaining electrons and zinc losing electrons.
• 💁 The reaction between copper sulfate and zinc forms solid copper and a clear solution of zinc sulfate.
• 💄 The oxidation state of copper decreases, making it reduced, while the oxidation state of zinc increases, classifying it as oxidized.

Questions & Answers

Q: What happens when copper sulfate is dissolved in water?

Copper sulfate, being an ionic compound, dissociates into copper cations and sulfate anions, forming a blue aqueous solution.

Q: What occurs when solid zinc is added to a copper sulfate solution?

In a redox reaction, copper cations from the solution take electrons from solid zinc, causing the copper to become solid and zinc to become zinc cations (as zinc sulfate) in the solution.

Q: How does the appearance of the solution change after the reaction?

The solution that initially has a blue color turns clear after the reaction due to the formation of zinc sulfate, which itself is a clear liquid.

Q: What are the half reactions of zinc and copper in this reaction?

The half reaction for zinc involves it losing two electrons and becoming zinc cations, while the half reaction for copper entails copper cations gaining two electrons and becoming solid copper.

Summary & Key Takeaways

• Copper sulfate, an ionic compound, is easily dissolved in water, creating a blue aqueous solution with copper cations and sulfate anions.

• When solid zinc is added to the copper sulfate solution, a redox reaction occurs, with copper taking electrons from zinc and becoming solid copper, while zinc becomes zinc cations in the form of zinc sulfate in the solution.

• The reaction results in a clear solution of zinc sulfate and solid copper precipitate.