Chemistry_pigments malachite 3r ESO

1. Synthetic Malaquite
(Basic Copper Carbonate)
Marc Caballer
Gil Arassa
Science 3r ESO

2. Preparation
●
1-CuSo4·5 H2O
●
2-NaHCO3

3. First step
●
Measure out 5 mL of a 0.5 M solution of copper
sulfate (CuSO4·5 H2O) into a small beaker.

4. Second step
●
Add about 5mL of solid sodium bicarbonate (NaHCO3),
a little at a time with stirring until all the fizzing has
stopped and the reaction is complete.

5. Third Step
●
Filter the precipitate of basic coopeer
carbonate-CuCo3·Cu(OH)2- that has formed.

6. Fourth Step
● Allow the pigment to dry uncovered on the
filter paper on your bench until next week.
The final result is this.

7. Fourth Step
● Allow the pigment to dry uncovered on the
filter paper on your bench until next week.
The final result is this.