Preparation of Copper Sulfate: A Chemistry Practical Experiment

The video tutorial explains the preparation of soluble salts by reacting dilute acids with insoluble metals, metal oxides, hydroxides, or carbonates. It uses the example of producing copper sulfate from copper oxide and sulfuric acid. The tutorial details the steps to obtain pure copper sulfate crystals, including heating, adding excess copper oxide, filtering, and crystallization. Safety precautions, such as wearing safety spectacles and tying back long hair, are emphasized throughout the experiment.

What is the purpose of adding excess copper oxide in the reaction with sulfuric acid?

• To create a gas byproduct

• To increase the temperature of the reaction

• To ensure all sulfuric acid is used up

• To produce more copper sulfate

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

• Heating sulfuric acid over a Bunsen burner

• Adding copper oxide to sulfuric acid

• Filtering the mixture

• Evaporating the solution

How do you know when to stop adding copper oxide to the sulfuric acid?

• When a gas is produced

• When the solution starts boiling

• When the copper oxide stops reacting and collects at the bottom

• When the solution changes color

What should be done after small crystals of copper sulfate start forming?

• Filter the solution immediately

• Turn off the Bunsen burner and let the solution sit

• Add more sulfuric acid

• Continue heating the solution

Which safety precaution is NOT mentioned for this experiment?

• Washing hands thoroughly

• Wearing safety spectacles

• Tying back long hair

• Using gloves