Chemical Reactions of Copper Compounds

Dr. B demonstrates a chemical reaction between sodium hydroxide and copper 2 sulfate, resulting in the formation of a blue precipitate, copper 2 hydroxide. The video explains the process, visual changes, and how to separate and dry the precipitate.

What are the initial states of sodium hydroxide and copper(II) sulfate in the reaction?

• Both are aqueous

• One is solid, one is aqueous

• Both are gaseous

• Both are solid

What is the precipitate formed in the reaction between sodium hydroxide and copper(II) sulfate?

• Sodium hydroxide

• Copper(II) sulfate

• Copper(II) hydroxide

• Sodium sulfate

What is the state of sodium sulfate after the reaction?

• Aqueous

• Gas

• Liquid

• Solid

What color is the copper(II) sulfate solution before it reacts with sodium hydroxide?

• Green

• Pale blue

• Red

• Yellow

What can be done with the copper(II) hydroxide precipitate after it is formed?

• It can be used to make sodium hydroxide

• It can be turned into a gas

• It can be dried to obtain solid copper(II) hydroxide

• It can be dissolved back into water