You will notice that, even after all the copper sulphate solution has passed through, it will still not be like a powder. All you can do is wait. We waited for a whole day during a bout of an English warm summer.
24 hours remember so be patient!
It is worth the wait.
Once you have done this experiment you can then use the copper carbonate for a different experiment, so bottle it up and label it. It is harmful to consume, so wash your hands carefully and keep out of reach of pets and young children.
If you want to know how to write what just happened in scientific terms it’s here:
2 CuSO4 + 2 Na2CO3 + H2O → Cu2(OH)2CO3 + 2 Na2SO4 + CO2