Register to reply 
Algebraic method to balance redox equations 
Share this thread: 
#1
Oct2013, 04:39 AM

P: 9

Hi all,
I'm learning how to solve redox equations. I found the algebraic method to solve equations such as this one: Fe[itex]^{2+}[/itex] + Cr[itex]_{2}[/itex]O[itex]_{7}[/itex][itex]^{2}[/itex] +H[itex]^{+}[/itex][itex]\rightarrow[/itex] Fe[itex]^{3+}[/itex] + Cr[itex]^{3+}[/itex] + H[itex]_{2}[/itex]0 and i was able to solve it. What I don't see is how to use that algebraic method to solve an equation without superscripts; since it doesn't allow you to balance the charges, right? like for example: NaOH + Cr(OH)[itex]_{3}[/itex] + NaClO[itex]\rightarrow[/itex] Na[itex]_{2}[/itex]CrO[itex]_{4}[/itex] +NaCl + H[itex]_{2}[/itex]O Thanks for your help. 


#2
Oct2313, 04:15 AM

Admin
P: 23,574

If everything is neutral (on both sides of the reaction) there is no need to separately balance the charge. But you can always write an additional identity
[tex]0\times a_1 + 0\times a_2 + ... = 0\times b_1 + 0\times b_2 + ...[/tex] (assuming a_{i} are stoichiometric coefficients on the LHS of the equation, and b_{i} are coefficients on the RHS). Compare ChemBuddy lecture on the algebraic method of reaction equation balancing  it shows how to balance both equations with charged and uncharged species. Use [sub][/sub] and [sup][/sup] tags to format the formulas, don't mix normal text with LaTeX, it is not guaranteed to work OK. 


Register to reply 
Related Discussions  
Balancing Redox equations half reaction method  Biology, Chemistry & Other Homework  1  
Balancing redox equations using 1/2 reaction method  Biology, Chemistry & Other Homework  3  
3 unknowns, 3 equations, failure on algebraic method  Precalculus Mathematics Homework  6  
How to balance equations using the half cell method?  Chemistry  3  
AP Chem, balance Redox equation  Introductory Physics Homework  1 