Exam 2 Review Monday October 10 6 30 PM 7 45 PM The same Data Sheet from the packet a periodic table and scratch paper will be provided for you Bring 2 pencils PSU photo ID calculator may not be text programmable Know Your Chem 110 section number and your PSU student ID number Do NOT bring Cell phones PDA s or any other electronic devices DO Wear hats with a brim backwards Keep bags and backpacks ZIPPED AND ON THE FLOOR Material Covered Lectures 1 11 Chapters 1 3 5 7 8 1 8 8 ALEKS Objectives 1 4 Format 28 Multiple choice questions some calculations some concept questions A 100 Score earns 34 points out of 200 course points 17 of final grade CH110 FA11 SAS 1 Concept Chemical Formulas Chemists have a variety of means to describe compounds Molecular Formula Chemical formula with subscripts of the number of atoms in each molecule Empirical Formula Chemical formula with subscripts of the number of atoms in each molecule Formula Weight Sum of of each atom in the chemical formula Molar Mass The mass of of molecules having a given chemical formula calculated from Mass Percentage The percent mass of a in a compound CH110 FA11 SAS 2 Concept Organic Compounds We learned about chemical formulas with a unit on organic chemistry Hydrocarbons contain only Four types of hydrocarbons alkanes have alkenes have alkynes have aromatics have Many organic compounds have isomers with the same but different Functional groups Additional atoms define a molecules and especially CH110 FA11 SAS 3 Organic Chemistry Which of the following molecules are structural isomers CH110 FA11 SAS 4 Molecular Analysis A sample weighing 127 3 mg contained 2 12 mmol Identify the sample CH110 FA11 SAS 5 Chemical Analysis What is the formula weight of the compound shown below CH110 FA11 SAS 6 Concept Molecular Geometry Structural Formula Valence eLewis structures e domains Vs Bonding domains Molecular geometry Identify polar bonds Molecular polarity CH110 FA11 SAS 7 Molecular Geometry What is the molecular geometry of CH110 FA11 SAS 8 Polarity Which of these molecules is polar CH110 FA11 SAS 9 Hybrid Orbitals What is the hybridization found in the central atom of CH110 FA11 SAS 10 Concept Bond Types A pi bond is stronger than a sigma bond A True B False All covalent molecules contain at least one pi bond A True B False Sigma bonds are symmetric and allow free rotation about the internuclear axis A True B False A molecule with resonance exhibits increased stability A True B False CH110 FA11 SAS 11 Bond Types How many sigma and pi bonds are there in the following molecule CH110 FA11 SAS 12 Intermolecular Forces Energy is required to break intermolecular forces A True B False List the phases of mater in order of increasing kinetic energy A Gas Liquid Solid B Liquid gas Solid C Solid Liquid Gas Intermolecular forces increase with increases in temperature A True B False CH110 FA11 SAS 13 Intermolecular Forces What intermolecular forces must be overcome to allow the following molecule to boil CH110 FA11 SAS 14 Intermolecular Forces Which molecule will have the higher boiling point CH110 FA11 SAS 15 Combustion Analysis Combustion of 7 75 mg of vitamin C which contains only C H and O gives 11 62 mg CO2 and 3 17 mg H20 Its molar mass is between 150 and 200 g mol What is its molecular formula CH110 FA11 SAS 16 Exam 2 Concepts You Should Know Chapter 3 Chemical Formulas Again How do we determine the composition of a compound from the various chemical formulas What is combustion analysis Chapter 25 Organic Molecules What are the properties of hydrocarbons What do the functional groups we learned about look like and how do they affect properties Chapter 9 Bonding and Geometry What are the shapes of the electron domain and molecular geometries we have studied What is molecular polarity and how is it determined by shape What are sigma and pi bonds How do hybrid orbitals relate to molecular shape and bond angles Chapter 11 Intermolecular Forces What are the IMFs we have learned about How do IMFs impact boiling and melting points CH110 FA11 SAS 17
View Full Document
Unlocking...