Chemical equations are symbolic representations of chemical reactions. They are central to every branch of chemistry and the primary mechanisms for understanding how elements & compounds interact during chemical equations. Any chemical reaction in existence, natural and artificial, can be represented through chemical equations, which play an essential role in determining the stoichiometric characteristics of a response.
Developing and balancing chemical equations is rudimentary in chemistry. If you need a homework helper every time while balancing equations in your chemistry homework & assignments, you need to work on your skills. This write-up offers valuable tips for writing and balancing chemical equations of any complexity. Go through it minutely for some solid insights from professional subject matter experts.
All chemical reactions involve elements and compounds exchanging/gaining/losing (or a combination of all) electrons. Equations represent these reactions using symbols & formulas of the input and the compounds and elements thus formed. A typical chemical equation represents the identities and quantities of the substances undergoing a chemical reaction.
CH4 + 2O2 🡪 CO2 + 2H2O
This is a balanced chemical equation that represents the combustion of methane.
The need to balance chemical equations stems from determining the exact molar ratios of the constituents and the resultants. Choosing the right molar amount is critical for conducting stable & prosperous reactions under practical scenarios. Furthermore, balancing chemical equations is necessary for satisfying the law of conservation of matter & energy. Nature’s processes adhere to this universal law, but our symbolic representations must do the same.
Balancing chemical equations can be troublesome, especially if the reaction is complex, multi-staged, and comprises multiple constituents. There are, however, specific ways to balance equations quickly and easily, no matter how difficult.
Three Ways to Balance Complex Chemical Equations Effortlessly
Method 1: Inspection or Trial & Error
The trial-and-error method is the most basic and heavily used technique for balancing chemical equations. You first need to inspect the inputs and outputs of an equation. Look at the individual elements on both sides and place numerical coefficients before the unbalanced elements/compounds.
Consider the following reaction denoting the combustion of butane:
C4H10 + O2 🡪 CO2 + H2O
Take a look at the elements on both sides. See the unbalanced ones? Can you balance them and the entire equation as a whole?
Method 2: Atom Counts
This method works the same as the trial-and-error method. The only difference is that you need to keep track of the changes in the molar ratios of all the constituents. Write them down along with their molar numbers, then follow the steps below.
- List down all the atoms/elements taking part in the reaction.
- Count all the atoms on both sides.
- Add the larger values in front.
- Multiply on both sides with coefficients as necessary to balance things out.
Method 3: Algebraic
This method involves developing simultaneous equations to balance things out. Here’s an example to elucidate things.
Consider the following example 🡪
CaCO3 + H3PO4 🡪 Ca3(PO4)2 + H2CO3
- First, add certain letter variables to the equations. They represent coefficients.
aCaCO3 + bH3PO4 🡪 cCa3(PO4)2 + dH2CO3
- Next, develop a set of simultaneous equations for every element in the reaction.
Ca: a = 3c
C: a =d
O: 3 + 4b = 8c + 3d
H: 3b = 2d
P: b =2c
- There are four unknowns and five equations, so the system is over-determined. But, upon reduction, we can quickly solve for all the variables.
Can you find the correct set of coefficients from the equations above?
The algebraic method is the best way to balance complex and extensive chemical equations. The inspection and atom count methods suit up to equations involving 2 to 3 elements. While initially intimidating, it remains the most effective way to solve complex chemical equations.
Using the Algebraic Method to Balance Chemical Equations
The abovementioned algebraic method has two variations: the General Algebraic Method and the Simplified Algebraic Method. Let’s have a look at each.
The Simplified Algebraic Method
Consider the following reaction 🡪
KMnO4 + HCl 🡪 MnCL2 + KCl + CL2 + H2O
The steps involved in the general algebraic method are as follows:
Step 1: Identify and list all the atoms on the left- and right-hand side.
Step 2: Next, balance the unbalanced atoms. Add necessary coefficients and variables to each reaction constituent.
Step 3: Write down the algebraic equations associated with every coefficient/variable for balancing. Solve for the variables, and that’s it!
The General Algebraic Method
This is nearly the same as the above, only that it is a bit longer & tedious.
Step 1: Add coefficient letters in front of every reaction constituent.
Step 2: Use the algebra rules to equate and find the correct value of all the coefficients associated with each atom/element.
Step 3: Get rid of all the unknown and irrelevant coefficients.
Step 4: Add all the coefficient values to the original chemical equation to balance it.
Those were some techniques for balancing complicated chemical equations. This article was an insightful and informative read for everyone. If you need help balancing chemical equations or chemistry assignments, connect with the experts of Tophomeworkhelper.com, a leading global online chemistry homework help service.
All the best!