Unit 5 - Reactions & Stoichiometry

Reactions & Stoichiometry  Objectives

4.1  Introduction for Reactions  - TRA-1.A – Identify evidence of chemical and physical changes in matter.

4.2 Net Ionic Equations – TRA-1.B – Represent changes in matter with a balanced chemical or net ionic equation: a) for physical changes; b) for given information about the identity of the reactants and/or product; c) for ions in a given chemical reaction.

4.3 Representations of Reactions – TRA-1.C – Represent a given chemical reaction or physical  process with a consistent particulate model.

4.4 Physical and Chemical Changes – TRA-1.D – Explain the relationship between macroscopic characteristics and bond interactions for: a) chemical processes; b) physical processes.

4.5 Stoichiometry – SPQ-4.A – Explain changes in the amounts of reactants and products based on the balanced reaction equation for a chemical process.

4.6 Introduction to Titration – SPQ-4.B – Identify the equivalence point in a titration based on the amounts of the titrant and analyte, assuming the titration reaction goes to completion.

4.7 Types of Chemical Reactions – TRA-2.A – Identify a reaction as acid-base, oxidation-reaction, or precipitation.

4.8 Introduction to Acid-Base Reactions – TRA-2.B – Identify species as Bronsted-Lowry acids, bases, and/or conjugate acid-base pairs, based on proton-transfer involving those species.

4.9 Oxidation-Reduction (Redox) Reactions – TRA-2.C – Represent a balanced redox reaction equation using half-reactions.

Reactions & Stoichiometry  Big Ideas

Big Idea 1: Scale, Proportion, and Quantity (SPQ)

• Enduring Understanding SPQ-4: When a substance changes into a new substance, or when its properties change, no mass is lost or gained.

Big Idea 3: Transformations (TRA)

• Enduring Understanding TRA-1: A substance that changes its properties, or that changes into a different substance, can be represented by chemical equations.

• Enduring Understanding TRA-2: A substance can change into another substance through different processes, and the change itself can be classified by the sort of processes that produced it.