Slide 1 of 37 © Copyright Pearson Prentice Hall Describing Chemical Reactions > Writing Chemical Equations Word Equations To write a word equation, write the names of the ___________ to the _____ of the _________ separated by _______ _________; write the names of the ___________ to the _______ of the arrow, also separated by _________ _________. Reactant + Reactant  Product + Product 11.1 Methane + Oxygen  Carbon dioxide + Water

Slide 2 of 37 © Copyright Pearson Prentice Hall Describing Chemical Reactions > Writing Chemical Equations Chemical Equations A ___________ ______________is a representation of a chemical ___________; the formulas of the ____________ (on the _______) are connected by an arrow with the formulas of the ___________ (on the ________). 11.1

Slide 3 of 37 © Copyright Pearson Prentice Hall Describing Chemical Reactions > Writing Chemical Equations Write the formulas of the ______________ to the ________ of the _____________ sign (arrow) and the formulas of the ______________ to the ______________. 11.1

Slide 4 of 37 © Copyright Pearson Prentice Hall Describing Chemical Reactions > Writing Chemical Equations A _____________ equation is a chemical equation that does ______ indicate the _________ ____________ of the reactants and products. Here is the equation for rusting: Fe + O 2  Fe 2 O

© Copyright Pearson Prentice Hall Slide 5 of 37

© Copyright Pearson Prentice Hall Slide 6 of 37 Practice Problems for Conceptual Problem 11.1

© Copyright Pearson Prentice Hall Slide 7 of 37 Describing Chemical Reactions > Balancing Chemical Equations To write a ____________ chemical equation, first write the _________ equation. Then use _____________ to balance the equation so that it obeys the ______ of conservation of ________. 11.1

Slide 8 of 37 © Copyright Pearson Prentice Hall Describing Chemical Reactions > Balancing Chemical Equations A chemical reaction is also described by a balanced equation in which each side of the equation has the __________ ___________ _______ _______________ of each ____________ and mass is conserved. 11.1

© Copyright Pearson Prentice Hall Slide 9 of 37

© Copyright Pearson Prentice Hall Slide 10 of 37 Practice Problems for Conceptual Problem 11.2

© Copyright Pearson Prentice Hall Slide 11 of 37

© Copyright Pearson Prentice Hall Slide 12 of 37 Practice Problems for Conceptual Problem 11.2