Final answer:
To remove sodium hydroxide and copper oxide from the mixture, wash the solution through a filter with water to remove sodium hydroxide and retain copper carbonate. Use a strong reducing agent to convert copper oxide back into soluble copper ions and separate them from the solution.
Step-by-step explanation:
To remove sodium hydroxide and copper oxide from a mixture of sodium hydroxide, copper carbonate, copper acetate, and copper oxide, you can perform a simple filtration process.
Since sodium hydroxide is soluble in water and copper carbonate is not, you can wash the mixture through a filter with water. This will retain copper carbonate as a precipitate while allowing sodium hydroxide to pass through. However, copper oxide cannot be removed through filtration.
To remove copper oxide, you can use a strong reducing agent like sulfuric acid or nitric acid to convert it back into soluble copper ions and then separate them from the solution.