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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.

Blue

Blue

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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