DESCRIBING CHEMICAL REACTIONS CHEMICAL REACTIONS One or more

DESCRIBING CHEMICAL REACTIONS

CHEMICAL REACTIONS One or more substances changes into different substances.

CHEMICAL REACTION EQUATIONS Word Equations: Names of chemicals are written out in full. Chemical Equations: Chemical formulas are used to represent the chemicals.

PARTS OF REACTION EQUATIONS Reactants: Substances that are used up during a reaction. Potassiu

PARTS OF REACTION EQUATIONS Products: Substances that are produced during the reaction. Potassium and

CHEMICAL REACTION RESULTS Chemical reactions can either absorb or release energy. included in equation.

CHEMICAL EQUATIONS Reactants Yields Products ? + ? ?

EQUATIONS Word Equation: iron + sulfur energy iron (II) sulfide + Chemical Equation: Fe + S energy Fe. S +

EQUATION GUIDELINES An arrow indicates the direction of the chemical reaction. Substances on the left are reactants. Substances on the right are products. Usually very difficult to have

EQUATION GUIDELINES State Symbols: Indicates the state or form of each substance Ex. (s) means solid (g) means gaseous (aq) means dissolved in water

EXAMPLES Zinc + copper sulfate energy Zn(s) + Cu. SO 4(aq) energy zinc sulfate + copper + Zn. SO 4 (aq) + Cu(s) +

VOCABULARY Chemical reaction Word equation Chemical equation Reactants Products State Symbols

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