Question

oxidation number of cr atom in CrO5 and K3CrO8 respectively​

Answer 1

Answer :

Heya Good Question ☺ !

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Oxidation State : A number which is assigned to an element in chemical combination which represents the number of electrons lost or gained.

A.T.Q,

Oxidation State of Cr on CrO5

Let the charge of Cr be x.

Then,

Compare charges only.

x + 5(-2) = 0

x - 10 = 0

x = 10

∴ Oxidation State of Cr on CrO5 is 10

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Oxidation State Of Cr in K3CrO8

Let The charge of Cr be x.

Now,Compare charges

3(+1) + x + 8(-2) = 0

3 + x - 16 = 0

x - 13 = 0

x = 13

$\rule{200}{2}$

More Key Points to Remember ☺ !

• Oxidation state of Group 1 elements are +1
• Oxidation state of Group 2 elements is +2
• Oxidation state for Halogens is -1
• Oxidation state for Oxygen is -2