The oxidation of chromium in Cr\(_2\)O\(_7)\(-2\) ?

Home » Past Questions » Chemistry » Waec » 2019 » The oxidation of chromium in Cr\(_2\)O\(_7)\(-2\) ?
Chemistry WAEC 2019

The oxidation of chromium in Cr\(_2\)O\(_7)\(-2\) ?

  • +4
  • +5
  • +6 checkmark
  • +7

The correct answer is: C

Explanation

2 atoms of Cr,

7 X -2 atoms of O

2Cr - 14 = -2

2Cr = -2 + 14

2Cr = 12

Cr = 6

Previous Question Next Question

Leave A Comment