Why Aren't There Examples of Redox Reactions with 3 Half Reactions in Textbooks?

[fish]

KBrO2 + KI + HBr ---> KBr + I2 + H2O

eq1
KBrO2 ---> KBr
4e- + 4H+ +KBrO2 ---> KBr + 2H2O

eq2
2KI ---> I2 + 2K+ + 2e-
4KI ---> 2I2 + 4K+ + 4e-

eq3
HBr ---> KBr
K+ + HBr ---> KBr + H+

since the charges in eq3 are +1=+1
you don't have to multiply this equation by 4 do you?

3H+ + KBrO2 + 4KI + HBr ---> 2KBr + 2H2O + 2I2 + 3K+


Haven't been able to find any examples or problems with
redox using 3 half reactions in any of my textbooks. Why
wouldn't they put a few in there?

 

[fish]

eq3
HBr ---> KBr
K+ + HBr ---> KBr + H+

multiply eq3 by 4 so K+ will cancel

4K+ + 4HBr ---> 4KBr + 4H+

adding all three:

KBrO2 + 4KI + 4HBr ---> 5KBr + 2H2O + 2I2

 

[ravenprp]

There could be a few reasons why you haven't found examples or problems with redox reactions using 3 half reactions in your textbooks. One possibility is that these types of reactions may be more complex and therefore not typically included in introductory chemistry textbooks. Another reason could be that these types of reactions are not commonly encountered in everyday chemistry applications. However, it is important to understand the concept of redox reactions and how to balance them using half reactions, as it is a fundamental concept in chemistry and may be encountered in more advanced studies or in real-life scenarios. It is always helpful to practice and familiarize yourself with different types of reactions, including those with 3 half reactions, to strengthen your understanding and problem-solving skills. You can also look for additional resources or ask your instructor for more examples or practice problems.