Practice Quiz

HOBET Review Questions

Category - Health Occupations Basic Entrance Test Practice Questions

Start a Study Session Sign up for Question of the Day
What is the oxidation state of chlorine in potassium perchlorate, KClO4?
  1. -7
  2. -3
  3. 0
  4. 3
  5. 7
Explanation
Answer: 7

Begin this problem by considering the oxidation state of oxygen. As in most oxides, oxygen has an oxidation state of -2. Multiply this value by four to account for all of the oxygens, giving a total oxidation value of -8. Potassium has an oxidation state of +1, bringing the total oxidation value to -7. In order to maintain electrical neutrality, chlorine must have an oxidation state of +7.
Previous Next
Was this helpful? Upvote!
Login to contribute your own answer or details
Start a Study Session Sign up for Question of the Day

Top questions

Related questions

Most popular on PracticeQuiz