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Chemical Equations. And balancing equations. Chemical Equation. CH 4 + O 2 CO 2 + H 2 O Reactants products Means to produce. Balancing Chemical Equations.
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Chemical Equations And balancing equations
Chemical Equation • CH4 + O2 CO2 + H2O • Reactants products • Means to produce
Balancing Chemical Equations • In a chemical reaction, atoms are neither created nor destroyed. All atoms present in the reactants must be accounted for among the products. • To accomplish this rule you must balance the equation
Balancing Chemical Equations • The accepted convention is that the “best” balanced equation is the one with the smallest whole numbers. These whole numbers are called the coefficients for the balanced equation.
Unbalanced Equations • 1. HgO Hg+ O2 1 Hg and 1 O 1 Hg and 2 O • 2. C+ O2 CO2 • 1 C and 2 O 1 C and 2 O • 3. Zn+ HCl H2 + ZnCl2 • 1 Zn and 1 H and 1 Cl 2 H and 1 Zn and 2 Cl
Answers for Balanced Equations • 1. 2HgO 2Hg+ O2 • 2. C+ O2 CO2 • 3. Zn+ 2HCl H2 + ZnCl2
More Practice at Balancing Equations • KBr+ H3PO4 K3PO4+ HBr • NH3 + Cl2 NH4Cl+ NCl3 • CaC2 + H2O Ca(OH)2 + C2H2
Answers • 3KBr+ H3PO4 K3PO4+ 3HBr • 4NH3 + 3 Cl2 3NH4Cl+ NCl3 • CaC2 + 2 H2O Ca(OH)2 + C2H2