Metal aquo complex

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What Wikipedia says

In chemistry, metal aquo complexes are coordination compounds containing metal ions with only water as a ligand. These complexes are the predominant species in aqueous solutions of many metal salts, such as metal nitrates, sulfates, and perchlorates. They have the general stoichiometry [M(H2O)n]z+.

Excerpt from the Wikipedia article “Metal aquo complex”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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