Chromate and dichromate - Wikipedia
The chromate ion (CrO42–) has a tetrahedral shape, whereas dichromate ion has two tetrahedral units with one common oxygen having Cr—O—Cr bond angle of °. Silver atom has a completely filled d orbitals (4d10) in its ground state. Why is the highest oxidation state of a. Potassium dichromate is prepared from chromates which in turn are prepared from chrome iron, Structure of chromate and dichromate ions are shown below: . When solid potassium dichromate (K2Cr2O7) is dissolved in water the resulting solution is orange. The dichromate ion in aqueous solution is in equilibrium with .
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