1. Word … and chemical equations

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

3. 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

4. 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)

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

6. 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.

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

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

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

10. Please complete
P227 #2, 3a, 4, 5abcd