CrO₄⁻²
Chromate
The chemical formula CrO₄⁻² represents a polyatomic ion known as chromate. It consists of one chromium atom and four oxygen atoms.
Chromate usually carries a negative two (-2) charge. The charge results from the conversion of a neutral chromic acid molecule (H₂CrO₄) into its conjugate base through the loss of two hydrogen ions (H⁺).
Chromate ion is an important chemical species used in many industrial processes, including pigment production, corrosion prevention, and electroplating. It is also an essential reagent in several analytical chemistry techniques, including titration.
Overall, CrO₄⁻² is a negatively charged polyatomic ion composed of one chromium and four oxygen atoms.
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