LEARNING OBJECTIVES

CHAPTER 5: Chemical Reactions and Quantities

You should know the meaning of the following terms: physical change, chemical change, combination reaction, decomposition reaction, double displacement reaction, single displacement reaction, neutralization, precipitation, oxidation, reduction, formula unit, mole, Avogadro’s number, molar mass, reagent (reactant), yield (actual, theoretical, and percent), percent purity (or composition).

Given the equation for a chemical reaction, you should be able to categorize the reaction as combination, decomposition, double displacement, single displacement, oxidation-reduction and should recognize that many reactions can belong to more than one category.

You should understand the meaning of the law of conservation of mass as applied to chemical reactions and the balancing of chemical reaction equations.

You should be able to interconvert among amounts of matter expressed in numbers of formula units, number of moles, and mass.

You should be able to perform stoichiometry calculations such as calculation of the amount(s) of substance(s) involved in a reaction if the amount of one substance is known; calculation of percent yield; calculation of percent purity or percent composition; calculations involving a limiting reagent.