Question

hey friends plz tell me about oxidation state of Cr in Cr2O72-

plzz​

Answer 1

HEY MATE [◆◆◆◆◆][●●●●●]______

Answer:

+

6

Explanation:

This is the dichromate ion,

C

r

2

O

2

−

7

.

Oxygen is more electronegative than chromium, so it'll take its usual

−

2

charge here. There are seven oxygen atoms, so the total charge is

−

2

⋅

7

=

−

14

.

Let

x

be the oxidation number of two chromium atoms. So, we got:

x

+

(

−

14

)

=

−

2

x

−

14

=

−

2

x

=

12

So, two chromium atoms have a total oxidation number of

+

12

. Since one is not more electronegative than the other, we can divide the number by two to get one chromium's oxidation number.

12

2

=

6

So, a chromium atom here has an oxidation number of

+

6

.

HOPE THIS HELP YOU..☺️☺️

${\bold{\red{\huge{@captain}}}}$

Answer 2

⭐Hola User...!!!

_______________

⭐Here is YOUR Answer..!!!!

〽________________

↪Oxidation states....

↪BAsically the total charge on the complex ion is -2 ...

↪thus also ww know that. . oxygen has -2 oxidation state..

↪so here applying formula we get as ....

↪lets the oxidation of Cr ( chromium ) be X

↪so

↪2X + 7 (-2) = -2

=》 2X -14 = -2

↪=》 2X = -2 +14

=》 2X = 12

↪THUS X = +6

↪< THUS the oxidation state of Cr is +6 >
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