Problem: Balance the following equation in acidic conditions. Phases are optional. Cr2 + H2MoO4 ::> Cr3  + Mo

FREE Expert Solution

Balance the redox reaction under acidic conditions:


Cr2+(aq)  + H2MoO4(aq) → Cr3+(aq) + Mo(s) 


*Before balancing the redox reaction:

• ignore H+, OH-, and H2O in the starting reaction


Step 1: Separate the whole reaction into two half-reactions


Cr2+(aq)  →  Cr3+(aq)                                                    H2MoO4(aq) → Mo(s) 


Step 2: Balance the non-hydrogen and non-oxygen elements first


Cr2+(aq)  →  Cr3+(aq)                                                    H2MoO4(aq) → Mo(s) 

(Cr: balanced)                                               (Mo: balanced)


Step 3: Balance oxygen by adding H2O(l) to the side that needs oxygen (1 O : 1 H2O)


Cr2+(aq)  →  Cr3+(aq)                                                    H2MoO4(aq) → Mo(s) + 4H2O(l)       

(No oxygens)                                               

View Complete Written Solution
Problem Details

Balance the following equation in acidic conditions. Phases are optional. 

Cr2 + H2MoO4 ::> Cr3  + Mo

Learn this topic by watchingBalancing Redox Reactions Concept Videos
All Chemistry Practice Problems Balancing Redox Reactions Practice Problems
Q.Balance the following equation in acidic conditions. Phases are optional. C2O42- + MnO2 → Mn2+ + CO2
Q.Assign oxidation states to all the elements in this unbalanced reaction: Ag+(aq) + Cu(s) → Ag(s) + Cu2+ (aq)Which substance gets oxidized?Which substa...
Q.Complete and balance the following half-reaction: NO3−(aq) → NO(g) (acidic solution) Express your answer as a chemical equation. Identify all of the p...
Q.Complete and balance the following half-reaction: H2SO3(aq) → SO2−4(aq) (acidic solution) Express your answer as a chemical equation. Identify all of ...
See all problems in Balancing Redox Reactions