3a-equation-balancing - CHM151LL: CHEMICAL EQUATION...

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CHM151LL: CHEMICAL EQUATION BALANCING | 1 Chemical Equation Balancing Chemical reaction equations represent ratios of amounts of the substances involved in a chemical change. The substances present before the reaction takes place we call reactants , and write their formulas on the left hand side of the equation. Those substances produced by the chemical reaction, written on the right, we call products . An arrow, which we read as "yields" or "produces" connects the two sides. reactant + reactant yields product + product Fe 2 O 3 (s) + 2 Al (s) Al 2 O 3 (s) + 2 Fe (l) solid iron(III) oxide reacts with solid aluminum producing solid aluminum oxide and liquid iron In balancing an equation, make sure that equal numbers of each kind of atom show on each side of the arrow. The partnership arrangements will change, but the balanced equation must show the same numbers and kinds of atoms on each side. You will usually find it easier to balance an equation by first finding the most complex formula and starting the counting operation with
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3a-equation-balancing - CHM151LL: CHEMICAL EQUATION...

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