Chemistry Practice Problems Balancing Redox Reactions Practice Problems Solution: Balance the following equation in basic solution u...

Solution: Balance the following equation in basic solution using the lowest possible integers and give the coefficient of water.AlH4-(aq) + H2CO(s) → Al3+ (aq) + CH3OH(aq)a. 4b. 3c. 6d. 5e. 2

Problem

Balance the following equation in basic solution using the lowest possible integers and give the coefficient of water.

AlH4-(aq) + H2CO(s) → Al3+ (aq) + CH3OH(aq)

a. 4

b. 3

c. 6

d. 5

e. 2

Solution

We're being asked to determine the coefficient of water in the balanced redox basic reaction of :

AlH4-(aq) + H2CO(s) → Al3+ (aq) + CH3OH(aq)


A redox reaction can be balanced (in basic solution) by these steps:

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

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

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

Step 4: Balance hydrogen by adding H+ to the side that needs hydrogen. (1 H: 1 H+)

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