balancing chemical equations. balancing equations identify the reactants & products (you may...
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Balancing Chemical Equations
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Balancing Equations
Identify the REACTANTS & PRODUCTS
(You may want to write a word equation )
![Page 3: Balancing Chemical Equations. Balancing Equations Identify the REACTANTS & PRODUCTS (You may want to write a word equation )](https://reader036.vdocument.in/reader036/viewer/2022082819/56649f275503460f94c3ec41/html5/thumbnails/3.jpg)
Balancing Equations
Using correct formulas and symbols, write an unbalanced
equation for the reaction.
{A SKELETON EQUATION}
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Balancing Equations
Balance atoms ONE element at a time by inserting coefficients.
START with elements that appear in only one reactant and
one product, and balance the atoms of those elements first.
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Balancing Equations
IF a polyatomic ion appears on both sides of the equation,
treat it as a single unit.
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Balancing Equations
Leave Oxygen and Hydrogen for the last elements to
balance.Double-check to be sure that the number of atoms of each element is the same on both
sides of the equation
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Balancing EquationsPRACTICE PROBLEMS
1. When propane (C3H8) burns completely in air(O2), the reaction forms carbon dioxide and water vapor. Write and balance the equation for this reaction.
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When propane (C3H8) burns completely in air(O2), the reaction forms carbon
dioxide and water vapor..
Step 1 the Skeleton Equation Step 1 the Skeleton Equation
C3H8 +O2 CO2 + H2O
Step 2 Count and Compare elementsStep 2 Count and Compare elements
(3 – C) 3(1 – C)
(8 – H) 4(2 –H)
(2 – O) x 5 (3 – O)
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C3H8 + 55 O2 33 CO2 + 44 H2O
Step 3 Use Coeffeicients to BalanceStep 3 Use Coeffeicients to Balance
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Balance the following skeleton chemical equations:
a. KI(aq) + Cl2(g) → KCl(aq) + I2(s)
b. Al(s) + H2SO4(aq) → Al2(SO4)3(aq) + H2(g)
c. Online problem check
Balancing EquationsPRACTICE PROBLEMS online