Practice question
Question
In 2Cr(OH)3 + 3H₂O₂ + 4NaOH → 2Na₂CrO₄ + 8H₂O, how many electrons are lost per chromium atom?
Explanation
Cr (+3 in Cr(OH)3) to +6 in CrO₄²−: change = +6 - (+3) = +3; each Cr loses 3 electrons.
Question