What is the value of n in the following equation? Cr₂O₇^2- + 14H⁺ + ne^- → 2Cr ³⁺ + 7H₂O

Kellydance

1 year ago

from the equation given,we have
-2 +14 +n =2x3 (the chromium, number of mole x charge)
-12+n=6
n=6-12
n=-6

note: always multiply the number of moles With the charge

Jessiqua

3 years ago

Explanation pls

red_kwatwa

2 months ago

In (Cr2O7)2- , each O is -2.
total O= -2 x 7= -14
Overall charge= -2
Therefore, the 2 Cr atoms together must be +12
Each Cr= +6
So Cr changes from +6 in dichromate to +3 in cr3+. This means each Cr atom gains 3 electrons (from +6 to+3)
2 Cr atoms: 2 x 3= 6 electrons total
Therefore, n=6

chijioke amanze

9 years ago

The answer is 3 myschool pls change this

busayo2

9 years ago

d ans is c