Chemical ChangesChemical Changes

Chemical PropertiesChemical Properties

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

Chemical ChangesChemical Changes

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

Signs of Chemical ChangeSigns of Chemical Change

Formation of BubblesFormation of BubblesChange in OdorChange in OdorColor ChangeColor ChangeEnergy ChangeEnergy Change

Chemical EquationsChemical Equations

ReactantsReactants: Present before the reaction : Present before the reaction (left side of equation)(left side of equation)

ProductsProducts: New substances formed during : New substances formed during the reaction (right side of equation)the reaction (right side of equation)

Arrow = yields or givesArrow = yields or gives

2H2H2 2 + O + O2 2 2H 2H22OO

Rate of ReactionsRate of Reactions

To increase the rate of the reaction:To increase the rate of the reaction:Increase the temperatureIncrease the temperatureIncrease the concentrationIncrease the concentrationIncrease the surface areaIncrease the surface area

Law of Conservation of MassLaw of Conservation of Mass

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