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Determine the oxidation state of chromium in K2CrO4.

  • Mayya Alocci
  • Jun 1, 2023
  • 1 min read

NY Chemistry Regents Exam Jan 2023


52 Determine the oxidation state of chromium in K2CrO4.


We can look at the periodic table to find oxidation numbers for K and O. K is +1 and O is -2.

Next we can make an equation to find Cr oxidation number. The overall charge of the molecule is 0 since the charge is not shown.


2(+1) + X + 4*(-2) = 0

X is the oxidation number for Cr

We get, 2+x-8 = 0

x-6=0

x=6


The oxidation number of Cr is +6


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