Making Copper Sulfate from Copper Oxide

This video tutorial from Free Science Lessons explains how to make a soluble salt using an acid, specifically focusing on the required practical of creating copper sulfate. The video covers the definition of salts, the components involved, and the step-by-step process of making copper sulfate using copper oxide and sulfuric acid. It also details the filtering and crystallization process to obtain pure copper sulfate crystals. The tutorial emphasizes the importance of ensuring all acid is reacted to avoid contamination and provides additional resources for exam preparation.

What is the main focus of this video tutorial?

• How to make a soluble salt using an acid

• The history of copper sulfate

• Different types of acids

• The periodic table

Which of the following is NOT a source of metal ions for making salts?

• Metal hydroxide

• Metal oxide

• Metal gas

• Metal itself

Why can't copper be used directly with dilute sulfuric acid to make copper sulfate?

• Copper is too reactive

• Copper is not reactive enough

• Copper is too expensive

• Copper is not available

What is the first step in making copper sulfate using copper oxide?

• Add copper oxide to boiling water

• Mix copper oxide with water

• Start with a fixed amount of dilute sulfuric acid

• Boil the sulfuric acid

What color does the solution turn when copper oxide reacts with sulfuric acid?

• Yellow

• Green

• Red

• Blue

What should you do if some copper oxide powder remains after stirring?

• Stop adding copper oxide

• Add more sulfuric acid

• Increase the temperature

• Add water

What is used to remove unreacted copper oxide from the solution?

• Filtration

• Evaporation

• Centrifugation

• Distillation

What is the purpose of heating the copper sulfate solution over boiling water?

• To dissolve the crystals

• To evaporate some of the water

• To increase the reaction rate

• To change the color of the solution

How long should the solution be left to form copper sulfate crystals?

• 12 hours

• 72 hours

• 24 hours

• 48 hours

What is the final step in obtaining pure dry crystals of copper sulfate?

• Adding more sulfuric acid

• Scraping and drying the crystals

• Filtering the solution

• Boiling the solution