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Question:

Making Copper Carbonate?

When I mixed Copper Sulfate and baking soda, I got a blue precipitate, I'm pretty sure this is Basic Copper II Carbonate. If I was to mix Sodium Carbonate instead of baking soda, would just Copper II Carbonate precipitate out instead? Also, does using baking soda to make a carbonate always make it a basic carbonate? Thank you for your time.

Answer:

Basic Copper Sulfate
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Pure copper(II) carbonate is very difficult to obtain as the usual methods all give the basic form! Copper carbonate is prepared by combining aqueous solutions of copper sulfate and sodium carbonate. Copper basic carbonate precipitates from the solution: 2 CuSO4 + 2 Na2CO3 + H2O → Cu2(OH)2CO3 + 2 Na2SO4 + CO2 Pure copper carbonate is obtained from basic copper carbonate in the presence of carbon dioxide at 180 °C and 4.6 MPa (46 atm) pressure.

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