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Chemistry: Semester 1 Final Exam Review Name: _________________________ The chemistry final exam is on Wednesday, January 21 (hours 1-3) and Thursday, January 22 (hours 4-6). It consists of 38 multiple choice questions and 8 short answer questions. Clickers – What do I need to study in order to be ready for the final? Clicker Concept 1 models of the atom 2 3 protons, neutrons, and electrons protons, neutrons, and electrons Check if INCORRECT Review Packet Problems Book Pages to Read Book Practice Problems 1-3 p. 102-108, p. 127-130 p. 108: 14; p. 132: 13 4-8 p. 110 p. 111: 15, 16 4-8 p. 111 p. 122: 50 4 isotopes 9 p. 112 p. 113: 20; p. 116: 21 5 nuclear reactions 10 p. 800-802 p. 808: 12 6 valence electrons 11-13 p. 187-188 p. 193: 7 7 ion charge 11-13 p. 188- 192 p. 193: 5, 6, 9 14-15 p.133-135 p. 135: 8; p. 151: 70 16 p. 261, 266 p. 282: 67 16 p. 268-269 p. 270: 22 17 p. 262-265, 270 p. 263: 11; p. 265: 13; p. 270: 24 19 p. 330-336 p. 339: 24 20 p. 337-339 p. 339: 26 20 p. 337-339 p. 339: 26 8 9 10 11 12 13 14 electron configuration naming ionic compounds naming covalent compounds writing formulas of compounds types of reactions predicting products of reactions predicting products of reactions 15 balancing equations 21-22 p. 324-327 p. 327: 3; p. 328: 5 16 balancing equations 23 p. 324-327 p. 327: 3; p. 328: 5 17 molar mass 24 p. 293-296 p. 315: 53 18 mole conversions 25-26 p. 297-299 p. 315: 58a-c, 59a-c 19 stoichiometry 27-30 p. 359-362 p. 361: 13 20 rate of reactions 31-33 p. 545-547 p. 547: 2, 4, 5 1 Unit 1: Atomic Structure and the Periodic Table Models of the Atom 1. Complete the chart below about the five different models of the atom: Model Drawing What does this model tell us about the structure of the atom? Dalton Thomson Rutherford Bohr Quantum 2. Explain one similarity and one difference between Thomson’s model of the atom and Rutherford’s model of the atom. 3. Explain one similarity and one difference between Rutherford’s model of the atom and Bohr’s model of the atom. Protons, Neutrons, and Electrons 4. How do you determine the number of protons in an atom? 5. How do you determine the number of electrons in an atom? 6. How do you determine the number of neutrons in an atom? 7. Because atoms are electrically neutral, the number of _______________ must equal the number of _______________. 2 8. Use a periodic table to complete the chart below: Element Atomic Atomic # of Symbol Number Protons a Chlorine # of Electrons # of Neutrons Mass Number 18 b Potassium 39 c Magnesium 24 d Fluorine e Aluminum f Sodium g Argon 10 27 11 40 Isotopes 9. Use a periodic table to complete the chart below: Atomic Number Element a Lithium b Bromine c Copper Atomic Mass (Atomic Weight) Number of Protons Number of Electrons Possible Mass Numbers (2 numbers) Possible Number of Neutrons (2 numbers) Mass of More Common Isotope Nuclear Reactions – Alpha and Beta Decay 10. Complete the following nuclear reactions and identify whether each is alpha or beta decay: 14 0 a. 6 C-1 e + _____ type: _______________ b. 32 14 32 c. 212 84 Po 2He + _____ d. 214 84 Po 82Pb + _____ Si 15P + _____ type: _______________ 4 type: _______________ 210 type: _______________ 3 Valence Electrons 11. Use a periodic table to complete the chart below: Element a Lithium b Oxygen c Potassium d Chlorine e Aluminum Chemical Symbol Number of Valence Electrons Lewis Dot Diagram Will it lose or gain electrons to become an ion? Number of electrons gained/lost Charge on the Ion 12. List two elements that have similar chemical and physical properties to barium. 13. Why do the elements you chose have similar chemical and physical properties to barium? Electron Configurations 14. How many electrons can the following subshells hold? s subshell: __________ p subshell: __________ d subshell: __________ f subshell: __________ 15. Use a periodic table to complete the chart below: Electron Configuration a 1s22s22p63s23p64s23d2 b 1s22s22p63s23p64s1 Element c phosphorous d fluorine e calcium # of Valence Electrons Shorthand Electron Configuration Unit 2: Ionic and Covalent Compounds Naming Ionic and Covalent Compounds 16. Circle whether the following compounds are ionic or covalent and then name the compounds: a) MgBr2 Ionic/Covalent ___________________________________ 4 b) SnF4 Ionic/Covalent ___________________________________ c) Ca(NO3)2 Ionic/Covalent ___________________________________ d) (NH4)2O Ionic/Covalent ___________________________________ e) Fe3(PO4)2 Ionic/Covalent ___________________________________ f) SiF4 Ionic/Covalent ___________________________________ g) KCl Ionic/Covalent ___________________________________ h) BaSO4 Ionic/Covalent ___________________________________ i) PbI2 Ionic/Covalent ___________________________________ j) N2S3 Ionic/Covalent ___________________________________ Writing Formulas for Ionic and Covalent Compounds 17. Fill in the chart below to show the transfer of electrons when calcium and phosphorous form an ionic bond. Then write the resulting chemical formula. # of valence electrons Lewis Dot Diagram Will it lose or gain electrons? How many? Calcium (Ca) Phosphorous (P) Chemical Formula 18. Circle whether the following compounds are ionic or covalent and then write the formulas for the compounds: a) lead(IV) oxide Ionic/Covalent _________________________ 5 b) aluminum bromide Ionic/Covalent _________________________ c) nitrogen tribromide Ionic/Covalent _________________________ d) ammonium sulfate Ionic/Covalent _________________________ e) sodium phosphate Ionic/Covalent _________________________ f) copper(II) nitride Ionic/Covalent _________________________ g) lithium sulfide Ionic/Covalent _________________________ h) diphosphorus pentoxide Ionic/Covalent _________________________ i) iron(II) carbonate Ionic/Covalent _________________________ j) potassium chlorate Ionic/Covalent _________________________ Unit 3: Chemical Reactions Types of Reactions 19. Identify the following types of reactions (synthesis, decomposition, combustion, single replacement, or double replacement): a) C6H14 + O2 → CO2 + H2O _________________________ b) AgNO3 + Ni → Ni(NO3)2 + Ag _________________________ c) Ca(C2H3O2)2 + Na2CO3 → CaCO3 + NaC2H3O2 _________________________ d) NaClO3 → NaCl + O2 _________________________ e) Ca + HCl → CaCl2 + H2 _________________________ f) Cu + S8 → CuS _________________________ g) C3H8 + O2 → CO2 + H2O _________________________ h) BaCO3 → BaO + CO2 _________________________ i) AgNO3 + K3PO4 → Ag3PO4 + KNO3 _________________________ j) K + H2O → KOH + H2 _________________________ 6 Predicting Reaction Products 20. Identify the type of reaction, and then predict the products: a) HNO3 + Ni → Type of reaction: Products: HNO3 + Ni → _________________________ b) Ca(OH)2 + HCl → Type of reaction: Products: c) Li + Cl2 → d) Zn + H2SO4 → _________________________ Zn + H2SO4 → _________________________ e) LiNO3 + K3PO4 → Type of reaction: Products: _________________________ Li + Cl2 → _________________________ Type of reaction: Products: _________________________ Ca(OH)2 + HCl → _________________________ Type of reaction: Products: _________________________ _________________________ LiNO3 + K3PO4 → _________________________ Balancing Chemical Equations 21. What is the law of conservation of mass? 22. Why must equations be balanced? 23. Balance the following equations: a) _____ Al(OH)3 + _____ H2CO3 → _____ Al2 (CO3)3 + _____ H2O b) _____ Al + _____ S8 → _____ Al2S3 7 c) _____ Cs +_____ N2 →_____ Cs3N d) _____ Mg +_____ Cl2 → _____ MgCl2 e) _____ Rb +_____ RbNO3 →_____ Rb2O +_____ N2 Unit 4: Stoichiometry (or Calculating Chemical Quantities) Molar Mass and Mole Conversions 24. Calculate the molar mass of the following: a) CO2 __________ b) Na2SO4 __________ c) Cu(NO3)2 __________ 25. Calculate the number of moles in the following: a) 964 g Na2SO4 b) 23.7 g Cu(NO3)2 26. Calculate the number of grams in the following: a) 5.15 moles Na2SO4 b) 0.97 moles Cu(NO3)2 8 Stoichiometry 27. In the reaction below, what is the ratio of moles of iron (Fe) used to moles of iron chloride (FeCl 3) produced? ___Fe + ___Cl2 ___FeCl3 28. How many moles of sodium carbonate (Na2CO3) are needed to react completely with 3.0 moles of calcium hydroxide (Ca(OH)2)? ___Na2CO3 + ___Ca(OH)2 ___NaOH + ___CaCO3 29. When 13.5 g of calcium chloride react with an excess of silver nitrate, how many grams of silver chloride are produced? ___CaCl2 + ___AgNO3 ___Ca(NO3)2 + ___AgCl 9 30. Iron (III) oxide and hydrogen gas are heated to form metallic iron and water. How many grams of iron are produced by heating 12.4 grams of iron (III) oxide? Unit 5: Rates of Reactions 31. What effect does each of the following have on the rate of a reaction? Explain your reasoning. a) Switching from a powder reactant to a solid block of the same reactant b) Adding more of a reactant c) Keeping the temperature constant using a water bath 32. A 6.0 g sample of Mg reacts with HCl in two different experiments. The reaction for both was: Mg + 2HCl → MgCl2 + H2 In the first experiment, it took 6.2 minutes for all the Mg to react. In the second experiment, it took 10.8 minutes for all the Mg to react. What are some possible explanations for the change in rate in the second experiment? 33. Using a drawing, explain why increasing the surface area increases the rate of a reaction. 10