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[CrO(3)" dissolves in aqueous "NaOH" to ...

[CrO_(3)" dissolves in aqueous "NaOH" to give "],[[Cr_(2)O_(7)^(2-),(b)CrO_(4)^(2)],[(c)Cr(OH)_(3),(d)Cr(OH)_(2)]]

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The chromate ion present in water sample is reduced to insoluble chromium hydroxide , Cr(OH)_(3) by dithionation, in basic solution . S_(2)O_(4)^(2-) + CrO_(4)^(2-) + 2H_(2)O to 2SO_(3)^(2-) + Cr(OH)_(3)+ OH^(-) 100 L of water requires 387 g of Na_(2)S_(2)O_(4) . The molarity of CrO_(4)^(2-) in waste water is

The chromate ion present in water sample is reduced to insoluble chromium hydroxide , Cr(OH)_(3) by dithionation, in basic solution . S_(2)O_(4)^(2-) + CrO_(4)^(2-) + 2H_(2)O to 2SO_(3)^(2-) + Cr(OH)_(3)+ OH^(-) 100 L of water requires 387 g of Na_(2)S_(2)O_(4) . The molarity of CrO_(4)^(2-) in waste water is

Select the correct statement(s) about Cr_(2)O_(7)^(2-) and CrO_(4)^(2-)