Word … and chemical equations

Learning goals We are learning to write word equations for chemical reactions. We are learning to write chemical equations for chemical reactions.

Word equations Summary of a chemical reaction using compound names General form: reactant(s) product(s) Reactant #1 + Reactant #2  Product #1 + Product #2 The “” is read as “produces”, “forms” or “yields” calcium chloride + sodium sulfate  calcium sulfate + sodium chloride

Silver Nitrate + Copper  Silver + Copper (II) Nitrate Hydrogen + Oxygen  Water vapour Reactants Products Reactants Products

aqueous state (dissolved in water) Word equations symbols used to indicate the state of reactants and products: Symbol State (g) Gas (s) Solid (l) Liquid (aq) aqueous state (dissolved in water)

CaCl2 (aq) + Na2SO4 (aq)  CaSO4 (s) + NaCl (aq) Skeleton equations summary of reaction using chemical formula CaCl2 (aq) + Na2SO4 (aq)  CaSO4 (s) + NaCl (aq)

Example #1 Write the word and skeleton equations for the following chemical reactions. Aluminum metal resists corrosion since it reacts with oxygen in the air to form a coating of protective aluminum oxide.

Example #2 Iron metal reacts with sulfur to produce iron (ii) sulfide. Energy is released when this occurs.

White Board Examples lithium reacts with calcium chloride to produce calcium and lithium chloride. copper reacts with oxygen gas to make copper (II) oxide. sodium and chlorine gas react to make sodium chloride.

Learning goals We are learning to write word equations for chemical reactions. We are learning to write chemical equations for chemical reactions.

Please complete P227 #2, 3a, 4ac, 5a