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| Copper sulfate
is CuSO4. According to Dualism, Cu and S, both of which are more
positive than O, are attracted
to and held by the negative oxygen.
Cu+ + O- ------> CuO S+ + 3O- ------> SO3 The charges of the elements don't cancel so the two products, CuO and SO3, remain slightly charged. These two residually charged pieces attract each other to form the final product CuO + SO3 ------> CuO·SO3 Dualistic theory was formulated by Berzelius as an outgrowth of electrochemistry. It works well for compounds such as salts and minerals.
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