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the color change during this reaxction is black to white. as we know the color of copper carbonate is black and when we add sulphuric acid to it. the reaction procced to form  anhydrous copper sulphate. which is white in color

CuCO3 is white coloured. When it reacts with sulfuric acid, the white solution changes into blue. This is due to the formation of Copper sulphate.

White Solid-> Blue Solution

the white CuCO3 powder when it reacts with H2SO4 will turn blue

Copper carbonate reacts with Sulphuric acid (reactants) giving rise to Copper sulfate (CuSO4) (residue, powder), Carbon dioxide (CO2)(gas) and Water (H2O)(liquid). This is a neutralization reaction, COPPER SULFATE IS BLUE IN COLOUR.



The colour change will be from colourless to blue. CO2 is formed which if put in lumewater will turn the colour of the solution milky white which is an indication of the formation of the reaction. 

U will observe a blue precipitate plus a gas co2 that will turn lime.water milky. 

This is a neutralization reaction that forms CuSO4. CuSO4 is sky blue.

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