# Algebraic method to balance redox equations

by diffrac
Tags: algebraic, balance, chemistry, equations, method, redox, redox balancing
 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$^{2+}$ + Cr$_{2}$O$_{7}$$^{2-}$ +H$^{+}$$\rightarrow$ Fe$^{3+}$ + Cr$^{3+}$ + H$_{2}$0 and i was able to solve it. What I don't see is how to use that algebraic method to solve an equation without superscripts; since it doesn't allow you to balance the charges, right? like for example: NaOH + Cr(OH)$_{3}$ + NaClO$\rightarrow$ Na$_{2}$CrO$_{4}$ +NaCl + H$_{2}$O Thanks for your help.
 Admin P: 22,708 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 $$0\times a_1 + 0\times a_2 + ... = 0\times b_1 + 0\times b_2 + ...$$ (assuming ai are stoichiometric coefficients on the LHS of the equation, and bi 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.

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