Question

The oxidation state of chromium is $+6$ in:

• A. Potassium chromate
• B. Potassium dichromate
• C. Both (a) & (b)
• D. None of these

Answer 1

Answer: (C)

$K_{2}Cr{O}_4$

$2(+1)+x+4(-2)=0$

$2+x-8=0$

$x-6=0$

$x=+6$

$K_{2}C{r}_2{O}_7$

$2(+1)+2x+7(-2)=0$

$2+2x-14=0$

$2x-12=0$

$x=+6$