anonymous
  • anonymous
oxidation state
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what is the oxidation state of Cr? |dw:1370782773235:dw|
anonymous
  • anonymous
can you explain how to get the answer
anonymous
  • anonymous
@.Sam.

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anonymous
  • anonymous
4 atoms of oxygen and one atom of Cr. The charge is 2- So if u arrange this into an equation x+ 4 x -2= 0 therefor x + -8= o x= 8
anonymous
  • anonymous
the answer is supposed to be Cr is 6+
anonymous
  • anonymous
i just dont understand why
chmvijay
  • chmvijay
yaa it oxidation state is +6
anonymous
  • anonymous
Oh i got it The overall charge is -2 of the compound and seperate -2 for oxygen atom So the overall equation will be X x 4-2= -2 x= -2+8 x= +6
chmvijay
  • chmvijay
Cr + 4(-2) =-2 Cr-8=-2 Cr=-2+8 =+6
anonymous
  • anonymous
but i thought neutral compounds are supposed to equal 0? no?
anonymous
  • anonymous
@chmvijay
chmvijay
  • chmvijay
yaaa but its not neutral here
chmvijay
  • chmvijay
yaa u have to consider than =0 for neutral molecules :) ur right
anonymous
  • anonymous
is it because its a transition metal and non metal?
anonymous
  • anonymous
is not neutral?@chmvijay
chmvijay
  • chmvijay
see CrO4-2 is not neutral but N2aCrO4 is neutral then you can claulate like this 2(+1) +Cr +4(-2) =0 2+Cr+-8 =0 Cr=+8-2 =6
chmvijay
  • chmvijay
it is nothing to do with ur transition metal and non metal
chmvijay
  • chmvijay
hey did u get it or noo :)any problem still scratching your head :)
anonymous
  • anonymous
so is there an easier way to identify when it is neutral or not@chmvijay?
chmvijay
  • chmvijay
yaaa neutral mean the over all compound should not bear any charge like Na2CrO4 here in this compound no charge over all can u make it out now where as CrO4-2 as it is bearing total -2 charge
anonymous
  • anonymous
got it thank u!
chmvijay
  • chmvijay
you are welcome :)

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