This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Nickel complexes. series of nickel sulphate and ethylenediamine solutions at different concentrations The solution to the left green contains only nickel sulphate own GFabio Nickel complexes
Page 2023 Free-images.com. All images are Public Domain