Unit Objectives for Chemistry

Unit V. Chemical Reactions and Stoichiometry

PS-5 Chemical reactions & stoichiometry- Chemical changes are described qualitatively and quantitatively using chemical equations. By writing balanced chemical equations, students will be able to predict types and quantities of products formed from these reactions.  

TS-5.1 Chemical equations– Chemical reactions are described by using balanced chemical equations. These show the relationship between reactants, products and conditions that make the reaction proceed.

  5.1.1Write a chemical equation using correct chemical formulas and symbols

  5.1.2 Balance chemical equations using atom inventories and coefficients

    Key Terms: reactant, product, catalyst, state symbols, Law of Conservation of Matter

TS-5.2 Types of chemical reactions- Chemical reactions can be grouped based on patterns of reactivity or driving forces (redox or acid/base). Characteristics of chemical reactions involve energy changes, rates and equilibria.

  5.2.1 Identify the types of chemical reactions based on types of particles and the pattern of reactivity

    Key Terms: synthesis/combination, decomposition, single replacement, double replacement & combustion

  5.2.2 Identify the types of chemical reactions based on driving forces

  5.2.3 Predict the products of chemical reactions based on types of particles and the patterns of reactivity

       Key Terms: reduction/oxidation, Lewis acid/base, metathesis, activity series (metals & nonmetals)

  5.2.4 Write ionic, net ionic and half reactions using oxidation states for a given molecular equation

TS-5.3 Mole Concept- A mole is an SI unit for quantity of matter which allows scientists to use measureable quantites of substances in the lab that matches to microscopic amounts.

  5.3.1 Correlate the mole and number of particles using Avogadro’s number

     Key Term: representative particles (atoms, molecules & formula units)

  5.3.2 Correlate the mole and the mass of a substance using molar mass

  5.5.3 Correlate the mole and volume of a gas at STP using molar volume

     Key Term:  Standard temperature & pressure

  5.3.4 Determine empirical and molecular formulas using the composition of a compound

TS- 5.4 Stoichiometry– The quantitative analysis of chemical reactions provides a way for analyzing amounts of materials that are reacted and/or produced.

  5.4.1 Determine mole ratios from the coefficients of a balanced chemical equation

  5.4.2 Solve stoichiometric problems using masses, particle numbers and volumes of gases at STP

  5.4.3 Identify limiting reactants of a chemical reaction given quantities of reactants

  5.4.4 Solve for percent yield using actual yields and theoretical yields calculated using stoichiometry

      Key Terms: percent error