Balance this chemical equation
FeS + O2 → Fe2O3 + SO2
Answers
balanced equation:
4 FeS + 7 O2 = 2 Fe2O3 + 4 SO2
Reaction type: double replacement
Answer: 4FeS + 7O2 → 2Fe2O3 + 4SO2
Explanation:
Algebraically, the equation FeS + O2 = Fe2O3 + SO2 is balanced.
Put a variable on each compound's label.
To indicate the unknown coefficients, give the equation a variable name for each chemical (reactant or product).
cFe2O3 + dSO2 = aFeS + bO2.
Put together a set of equations.
The number of atoms of each element (Fe, S, and O) in each reactant or product should be represented by a term in an equation.
Fe: 1a + 0b = 2c + 0d
S: 1a + 0b = 0c + 1d
O: 0a + 2b = 3c + 2d
Simplify All Variables
To solve for each variable, use gauss elimination, substitution, or a calculator.
Simplify the result to get the lowest, whole integer values.
a = 4 (FeS)
b = 7 (O2)
c = 2 (Fe2O3)
d = 4 (SO2)
Substitute Coefficients and Verify Result
4FeS + 7O2 = 2Fe2O3 + 4SO2
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