Chemical Changes.

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Presentation transcript:

Chemical Changes

Chemical Properties Chemical Properties: characteristic of matter that can be observed as it changes to a different type of matter.

Chemical Changes Chemical Change: Change in matter in which the substances that make up the matter change into other substances with new physical and chemical properties.

Signs of Chemical Change Formation of Bubbles Change in Odor Color Change Energy Change

Chemical Equations Reactants: Present before the reaction (left side of equation) Products: New substances formed during the reaction (right side of equation) Arrow = yields or gives 2H2 + O2 2H2O

Rate of Reactions To increase the rate of the reaction: Increase the temperature Increase the concentration Increase the surface area

Law of Conservation of Mass The total mass before and after a reaction is the same (i.e. Mass is neither lost nor gained).