Semester 2 Final Exam 2015
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The semester 2 exam will consist of 75-100 multiple choice questions and 10 short answer or extended
response questions.
Gather together your notes, quizzes and tests for Units 4-8.
Use the learning targets for these units and your notes, quizzes and tests to prepare for the exam.
The Semester 2 Review WS includes examples of short answer and extended response questions.
Learning Targets
U4: Describing Substances
Student will be able to:
 Distinguish between pure substances and mixtures
 Describe how one could use differences in characteristic properties to separate the components of a mixture
 Sketch particle diagrams that distinguish compounds, elements, and mixtures
 Distinguish elements from compounds in terms of differences in their properties
 Cite the evidence that supports the belief that some pure substances are "compounded" of simpler particles in
a definite ratio
 Cite evidence for Avogadro's Hypothesis. Use this with evidence from combining volumes to deduce the
formulas of some compounds
 State features of Dalton's model of the atom; use composition by mass data to account for the laws of
definite and multiple proportions
Unit 5: Counting Particles Too Small To See
Student will be able to:
 Use experimental data to determine the relative mass of two objects.
 Use experimental data to determine the number of items in a sample without actually counting them.
 Given the chemical formula of a substance, determine the molar mass.
 Given the mass of a substance, determine the number of moles of the sample and the number of atoms or
molecules of the sample.
 Given the number of moles of a substance, find the mass of the sample and the number of atoms or molecules
in the sample.
 Given the formula of a compound, determine its percent composition.
 Given data about the percent composition of a sample, determine the empirical formula of the compound.
 Given the empirical formula and information about the molar mass of the compound, determine the molecular
formula.
Unit 6: Particles With Internal Structure
Student will be able to:
 Describe the evidence that supports the idea that the simple particles have a property we call charge
 Describe the evidence that led Thomson to suggest that the mobile charge in atoms is negative.
 Use the Thomson model of the atom to account for the fact that neutral atoms can become either positively or
negatively charged by the loss or gain of electrons.
 List properties that distinguish metals from non-metals.
 Describe evidence that distinguishes ionic from molecular compounds.
 Given the formula of an ionic or molecular substance, write its name.
 Given the name of ionic or molecular substances, write the formula.
 From the name or formula of a substance, determine whether that substance is ionic or molecular.
Unit 7: Chemical Reactions - Particles & Energy
Student will be able to:
 Describe chemical changes in terms of rearranging atoms to form new substances.
 Recognize that the total number of particles (sum of the coefficients) can change during a reaction because
of differences in the bonding ratios of each substance.
 Recognize that the total number of atoms does not change during a reaction because every reactant atom
must be included in a product molecule.
 Learn to describe reactions in terms of macroscopic observations.
 Learn to describe reactions in terms of microscopic behavior of atoms.
 Learn to write balanced equations to represent these changes symbolically.
 Explain that the coefficients in a chemical equation describe the quantities of the individual atoms or
molecules involved and the moles of the substances involved.
 Observe basic patterns in the way substances react and learn to generalize them to other reactions students
encounter - synthesis reactions, decomposition reactions, combustion reactions, single replacement reactions,
& double replacement reactions.
 Describe endo- and exothermic reactions in terms of storage or release of chemical potential energy and draw
energy bar charts to show each.
Unit 8: Stoichiometry
Student will be able to:
 Using a balanced equation, determine the change in the number of moles of any other reactant or product using
the number of moles of reactant consumed or product formed.
 Use molar mass to convert mass of a reactant or product to moles for use in stoichiometric calculations or to
convert moles from stoichiometric calculations to mass.
 Beginning with a balanced chemical equation, the mass of a reactant consumed and the mass of product actually
produced, determine the percent yield for the reaction.
 Beginning with a balanced chemical equation and the initial masses of the reactants, determine which reactant
is limiting and what the theoretical yield is for each product.
 Given a balanced chemical equation and the initial amounts of reactants, sketch particle diagrams to represent
the mixture in the reaction vessel before and after the reaction.