Making Salts Experiments: Producing Dry Pure Samples of Copper Chloride in Two Different Ways

The video tutorial explains the process of making copper chloride salts using two methods: copper carbonate and copper oxide. It covers the theory of salt formation, the equipment needed, and safety precautions. The experiments involve reacting the base with hydrochloric acid, filtering excess base, and crystallizing the salt. The video emphasizes the importance of using excess base to ensure complete reaction and provides a step-by-step guide to obtaining pure copper chloride crystals.

What is a salt in the context of chemistry?

• A compound formed by the reaction of an acid with a base

• A compound formed by the reaction of a metal with water

• A compound formed by the reaction of two bases

• A compound formed by the reaction of two acids

Which equipment is used to measure the volume of hydrochloric acid?

• Beaker

• Measuring cylinder

• Evaporating basin

• Spatula

Why does Katherine add excess copper carbonate during the experiment?

• To produce more carbon dioxide

• To increase the reaction speed

• To make the solution more acidic

• To ensure all hydrochloric acid is used up

What indicates that the reaction between copper carbonate and hydrochloric acid is complete?

• The fizzing stops

• The temperature increases

• The solution turns blue

• The solution becomes clear

What is the purpose of heating the solution during the crystallization process?

• To change the color of the solution

• To increase the acidity of the solution

• To evaporate water and form crystals

• To dissolve more copper chloride

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

• 24 hours

• 48 hours

• 72 hours

• 12 hours

In the second experiment, what is the main difference in the reaction compared to the first?

• A different acid is used

• No gas is produced

• More heat is required

• The reaction is faster

What is the role of the filter paper in the experiments?

• To stir the mixture

• To remove insoluble substances

• To heat the solution

• To measure the volume of reactants

Why is it important to wear safety spectacles during the experiments?

• To measure the temperature

• To see the reaction clearly

• To prevent evaporation

• To protect from chemical splashes

What is the final step in obtaining dry, pure copper chloride crystals?

• Drying the crystals on filter paper

• Adding more hydrochloric acid

• Filtering the mixture

• Heating the solution