1.

What are the species X and Y in the followingX+H_(2)OtoH_(2)Cr_(2)O_(7)overset(OH^(-))toY

Answer»

`CrO_(4)^(-2),Cr_(2)O_(7)^(-2)`
`CrO_(3),Cr_(2)O_(3)`
`H_(2)CrO_(4),H_(2)Cr_(2)O_(7)`
`CrO_(3),CrO_(4)^(-2)`

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