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 + chlorine  calcium chloride

Silver Nitride + Copper  Silver + Copper Nitride Hydrogen + Oxygen  Water vapour Reactants Products Reactants Products

chemical equations summary of reaction using chemical formula Ca + Cl2  CaCl2

H2 O2 F2 Br2 I2 N2 Cl2 Diatomic molecules any molecule that is bonded with the 2 of the same atom diatomic 7 H2 O2 F2 Br2 I2 N2 Cl2

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 Magnesium metal reacts with sulfur to produce magnesium sulfide. Energy is released when this occurs.

Whiteboard Examples lithium reacts with calcium chloride to produce calcium and lithium chloride. gold reacts with oxygen gas to make gold 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.