C r O 4 2 - (yellow) changes to C r 2 O 7 2 - (orange) in pH = x and vice-versa in pH = y. Hence, x and y are

Question

C r O 4 2 - (yellow) changes to C r 2 O 7 2 - (orange) in pH = x and vice-versa in pH = y. Hence, x and y are, 6, 8, 6, 5, 8, 6, 7, 7

MARKS App · Accepted Answer

C r O 4 2 - (yellow) changes to C r 2 O 7 2 - (orange) in acidic medium so pH = x = 6. 2 C r O 4 2 - + 2 H + → C r 2 O 7 2 - + H 2 O The opposite reaction takes place in basic medium so pH = y = 8. C r 2 O 7 2 - + 2 O H - → 2 C r O 4 2 - + H 2 O

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