Explanation:
When the student mixed the solution sodium carbonate with solution of copper(II) sulfate ; Copper Hydroxocarbonate , sodium sulfate and carbon dioxide gas was obtained as a products.
The balanced chemical reaction
[tex]2Na_2CO_3+2CuSO_4\rightarrow Cu_2(OH)_2CO_3+2Na_2SO_4+CO_2[/tex]
Where:
[tex]Cu_2(OH)_2CO_3[/tex] = Copper(II) Hydroxocarbonate
[tex]Na_2CO_3[/tex] = Sodium carbonate
[tex]CuSO_4[/tex] = Copper(II) sulfate
[tex]Na_2SO_4[/tex] = Sodium sulfate
[tex]CO_2[/tex] = Carbon-dioxide