Daily Science pg. 68 Name the following Covalent compounds –SO 2 OF 2 –N 2 OCCl 4 –PCl 5 N 2 O 5 –P 2 O 5 NH 3 Write the formula from the name –Iron (II) oxidePotassium Nitrate –Diphophorus pentoxideBoron trifluoride –Calcuim Chloridetrinitrogen heptoxide Name the following ionic compounds: – CaCO 3 Fe 2 O 3 –KClNiBr 3 –FeSO 4 AuCl 3 –LiBrNaI –MgCl 2 –FeCl 3

Chemical Reactions Foldable- pg. 67

Making a chemical reaction Obtain the following materials: –Soap, yeast, hydrogen peroxide, a plastic bottle, funnel, and tub Mix the yeast with water and add a few drops of food coloring. Into the bottle, add the hydrogen peroxide (H 2 O 2 ) Next, add the soap Lastly, add the water and yeast mixture. Stand back and observe.

Components of a Chemical Reaction Reactants- shown on the right side of the chemical equation Reaction arrow- shows change between reactants and products Products- shown on left of chemical equation

Reactants If the reactants require energy to break bonds, they are called endothermic

Products If bonds are created, energy is released creating an exothermic process

Catalysts Catalysts are used to speed up chemical processes. If a catalyst is used, it is written above the equation arrow.

Writing chemical equations Word equation: –Methane and oxygen yield carbon dioxide and water Molecular model – +  + Chemical equation –CH 4 + 2O 2  CO 2 + 2H 2 O

Balancing Chemical Equations The number of atoms of each reactant = the number of atoms of each product. –Ex. CH 4 + 2O 2  CO 2 + 2H 2 O –Reactants:Products »C-1C-1 »H-4H-4 »O-4O-4

practice Pg. 227