What is the charge on the chromium ion in the ionic compound that has the formula $Cr_2O_3$ ?

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Answer 1 · 2017-06-28T01:32:56

+3

A compound has a zero net charge. so

$2 xx Cr + 3 xx O = 0$

Oxygen O almost always has a charge of -2 so

$2 xx Cr + 3 xx (-2) = 0$

$2 xx Cr + -6 = 0$ add + 6 to both sides

$2 xx Cr + -6 +6 = 0 + 6$ so

$2 xx Cr = +6$ divide both side by 2

$2/2 xx Cr = + 6/2$ equals

$Cr = + 3$

What is the charge on the chromium ion in the ionic compound that has the formula Cr_2O_3Cr_2O_3?