First Semester General Review for Exam                            January 2008

Unit 4: Names and Formulas of Compounds

Ø      Be able to write formulas from names and names from formulas for ionic and molecular compounds as well as for acids.

Ø      Know the names, formulas and charges of the required poly atomic ions.

Ø      Give properties and the characteristics of crystal structure for ionic compounds.

Ø      State the properties of molecular compounds.

Ø      Describe bonding in ionic and molecular compounds.

Ø      Differentiate between non-polar, polar and ionic bonds in terms of bonding electrons.

Ø      For molecular compounds:

o       Draw Lewis structures

o       State the geometry and

o       Give the molecular polarity

Ø      Draw and be able to interpret atomic level pictures for ionic and molecular compounds.

For SAMPLE QUESTIONS consult your returned Unit 4 Test

Consider this synthesis question: “Distinguish between the two extremes of bonding, covalent and ionic, in terms of how each is formed, how to predict which will be formed when various elements combine and in terms of three properties of each of the resulting compounds.”

Unit 5: Chemical Quantities and Calculations

• Review rules for determining significant figures in measurements and calculations.

• Know the basic conversions between SI prefixes.

• Perform simple conversions between units given necessary information using dimensional analysis.

• Understand what a percent is and use percents in calculations.

• Interconvert between particles, moles, volumes of gases, liquids and solids and mass using the appropriate conversion factors.

• Solve multi-step conversions.

• Interpret atomic level pictures.

• Determine the percent composition of the elements in a compound from the formula.

• Determine the empirical formula of a compound from percent or lab data.

• Determine the molecular formula from molecular mass and empirical formula.

For SAMPLE QUESTIONS see the returned Unit 5 Test and the Self-Test 5.

Unit 6: Chemical Reactions and Stoichiometry

• Be able to identify types of reactions.

• Balance equations.

• Predict products of chemical equations and then balance them.

• Identify the states of compounds and elements in the chemical equation using the solubility chart and periodic table.

• Interpret chemical equations in atomic level pictures.

SOME PRACTICE (in addition use the Self-Test and Chapter 11 Quiz.)

Balance the following equations:

____NaHCO₃ (s)  -----> ____  Na₂CO₃ (s)  + ____  H₂O(l)  + ____ CO₂(g)

____CH₄(g)  +  ____O₂(g)   ----> ____H₂O(g)  + ____ CO₂(g)

____NH₄NO₃(s)    -------> ____ N₂(g)  + ____ H₂O(g)  + ____ O₂(g)

 ____ ZnS(s)  + ____ O₂(g)  -----> ____ ZnO(s)  + ____ SO₂(g)

magnesium hydroxide (aq) + ammonium phosphate (aq) ----> magnesium phosphate (s)  + 
ammonia (g)  + water (l)

Tough one:

____NaI  +  ___MnO₂  +  ___H₂SO₄  à  ___Na₂SO₄  +  ___MnSO₄  +  ___H₂O  + ____I₂