1. When copper powder reacts with oxygen, a chemical change occurs, leading to the formation of copper(II) oxide. Initially, the shiny metallic surface of copper turns dull as the copper atoms combine with oxygen molecules. This reaction is exothermic, generating heat. The copper(II) oxide formed appeaRead more

    When copper powder reacts with oxygen, a chemical change occurs, leading to the formation of copper(II) oxide. Initially, the shiny metallic surface of copper turns dull as the copper atoms combine with oxygen molecules. This reaction is exothermic, generating heat. The copper(II) oxide formed appears as a black solid, distinct from the original reddish-brown color of copper powder.

    See less
    • 4
  2. The chemical formula for hydrated copper sulfate is CuSO₄•xH₂O, where x represents the number of water molecules associated with each copper sulfate molecule. Typically, the most common hydrated form is CuSO₄•5H₂O, known as copper(II) sulfate pentahydrate, which contains five water molecules per copRead more

    The chemical formula for hydrated copper sulfate is CuSO₄•xH₂O, where x represents the number of water molecules associated with each copper sulfate molecule. Typically, the most common hydrated form is CuSO₄•5H₂O, known as copper(II) sulfate pentahydrate, which contains five water molecules per copper sulfate molecule.

    See less
    • 4