Copper Reduction and Recovery Due Today: 1. Copper Reduction Pre-Lab Homework: 1. Copper Reduction Formal Lab Report 2. Redox Titration Pre-Lab Copper Reduction and Recovery

Objective Recover a copper sample via reduction reaction Determine the efficacy of the experiment

Key Terms Oxidation-Reduction (Redox) Reaction: Follow the transfer of electrons Matched reaction – you cannot have one without the other

Procedure Notes Part I: Preparation of Copper Solution Calculate the amount of CuSO4˙5H2O needed DO NOT forget to include the 5 water molecules Check your calculation before you make your solution

Procedure notes USE A VOLUMETRIC FLASK TO MAKE YOUR SOLUTION!!! Use a 400 mL beaker to heat and stir your solution Work in the hood

Procedure Notes Part II: Reduction of Copper Calculate the amount of zinc needed to react with the copper (II) sulfate Check your zinc calculation before you proceed The solution should be colorless at the end of 30 minutes May take less than 30 minutes

Procedure Notes Part III: Separation of Copper Vacuum filtration Weigh the filter paper Place sample in the over to dry (optional)

Procedure notes Determine the mass of your copper Tare a watch glass (zero the balance) Use a micro spatula to put your copper sample and filter paper onto the watch glass

Waste Recovered copper – solid waste container Filter Paper – Trash can Filtrate – Copper recovery filtrate container

Risk assessment Hydrochloric Acid Danger Inhalation Hazard Corrosive

Risk assessment Ethanol Acetone Danger Flammable Respiratory Irritant Skin Irritant