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What is the effect of pH on the solution of K_(2)Cr_(2)O_(7) solution? |
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Answer» Solution :In aqueous solution `:`` underset("Dichromate ion ( ORANGE red)")(Cr_(2)O_(7)^(2-))+H_(2)O hArr underset("Chromate ion ( YELLOW)") (2CrO_(4)^(2-))+ 2H^(+)` In acidic MEDIUM (i.e., decreasing pH ) ,equilibrium SHIFTS backward and the colour is organe red. In basic medium (i.e., increasin pH ), equilibrium will shift forward and thesolution is yellow . |
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