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balancing equation
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Answer:
This example illustrates the fundamental aspects of any chemical equation:
The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation.
The substances generated by the reaction are called products, and their formulas are placed on the right sight of the equation.
Plus signs (+) separate individual reactant and product formulas, and an arrow (
→
) separates the reactant and product (left and right) sides of the equation.
The relative numbers of reactant and product species are represented by coefficients (numbers placed immediately to the left of each formula). A coefficient of 1 is typically omitted.
It is common practice to use the smallest possible whole-number coefficients in a chemical equation, as is done in this example. Realize, however, that these coefficients represent the relative numbers of reactants and products, and, therefore, they may be correctly interpreted as ratios. Methane and oxygen react to yield carbon dioxide and water in a 1:2:1:2 ratio. This ratio is satisfied if the numbers of these molecules are, respectively, 1-2-1-2, or 2-4-2-4, or 3-6-3-6, and so on (Figure 2). Likewise, these coefficients may be interpreted with regard to any amount (number) unit, and so this equation may be correctly read in many ways, including:
One methane molecule and two oxygen molecules react to yield one carbon dioxide molecule and two water molecules.
One dozen methane molecules and two dozen oxygen molecules react to yield one dozen carbon dioxide molecules and two dozen water molecules.
One mole of methane molecules and 2 moles of oxygen molecules react to yield 1 mole of carbon dioxide molecules and 2 moles of water molecules.
Answer:
Examples of Balancing Chemical Equations
Example 1. C5H12 + O2 ---> CO2 + H2O. ...
Example 2. Zn + HCl ---> ZnCl2 + H2 ...
Example 3. Ca(OH)2 + H3PO4 ---> Ca3(PO4)2 + H2O. ...
Example 4. FeCl3 + NH4OH ---> Fe(OH)3 + NH4Cl. ...
Example 5. S8 + F2 ---> SF6 ...
Example 6. C2H6 + O2 ---> CO2 + H2O. ...
Example 7. Al2(CO3)3 + H3PO4 ---> AlPO4 + CO2 + H2O.
Explanation:
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