Quiz 4

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University of Massachusetts, Lowell *

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Chemistry

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Jan 9, 2024

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Name: _______________ Quiz 4 Section: 1. ( True /False) Ionic bonding results from the electrostatic attraction of oppositely charged ions that are typically produced by the transfer of electrons between metallic and nonmetallic atoms. 2. ( True /False) Table salt, NaCl(s) can not conduct electricity. 3. ( True /False) There is no molecular formula for Potassium Chloride. 4. (2 points) What is the name of P 4 S 10 ? a. Tetraphosphorus decasulfite c. Tetraphosphorus decasulfide b. Decasulfide tetraphosphorus d. Fourphosphorus tensulfide 5. (2 points) What is the name of HBrO(aq)? a. Hydrobromous acid c. Hypobromous acid b. Bromic acid d. Perbromic acid e. Home Box Office 6. (2 points) Choose the correct name for Cu 2 (HPO 3 ): a. Copper (II) hydrogen phosphite b. Dicopper hydrogen phosphate c. Copper (I) hydrogen phosphite d. Copper (II) hydrogen phosphite e. Copper (I) hydrogen phosphate 7. Which of the following is hypochlorous acid? a. HClO 4(aq) b. HCl (aq) c. HClO 3(aq) d. HClO (aq)

8. Which of the following has the highest lattice energy? a. K 2 O b. MgO c. CaO d. CaS e. Al 2 O 3 9. What is the dipole moment of a proton and an electron (q= 1.6x10 -19 C) by a distance of 130pm? (μ = qr, 1D = 3.34x10 -30 C.m) a. 3.1D b. 12.4D c. 6.2D d. 2.5D 10. (2 points) Continuing previous question, suppose a diatomic molecule with bond length of 130pm has a dipole moment of 3.5D. What is the percentage of ionic character? a. 28% b. 56% c. 14% d. 78% 11. (2 points) Continue previous question, what is the partial charge carried by the anion? a. +0.56 b. +1.56 c. -0.56 d. -1.56 e. +156 12. (13 points) Draw Lewis structure of SeOF 2 . Please use formal charge to find the best Lewis structure. Formal charge = valence electrons – ½ bonding electrons – nonbonding electrons

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Name: _______________ Quiz 4 1. ( True /False) Water is a molecule. But there is no sodium chloride molecule. 2. ( True /False) Table salt can not conduct electricity in the solid form. 3. ( True /False) Electrons shared in pure covalent bonds have an equal probability of being near each nucleus. 4. (2 points) What is the name of Fe(IO 4 ) 2 ? a. Iron dihypoiodate b. Iron(I) hypoiodate c. Iron(I) periodate d. Iron(II) diiodate e. Iron(II) periodate 5. (2 points) Choose the correct formula for Calcium hypochlorite: a. CaCl 2 b. CaClO 3 c. Ca(ClO 4 ) 2 d. Ca(ClO) 2 6. (2 points) Choose the correct name of H 2 S(aq)? a. Hyposulfuric acid c. Hydrosulfuric acid b. sulfuric acid d. Sulfurous acid e. Sulfite acid 7. What is the dipole moment of a cation and an anion (q= 1.6x10 -19 C) by a distance of 260pm? (μ = qr, 1D = 3.34x10 -30 C.m) a. 3.1D b. 6.2D c. 12.4D d. 2.5D 8. (2 points) Continuing previous question, suppose a diatomic molecule with bond length 260pm has a dipole moment of 3.5D. What is the percentage of ionic character? a. 56% b. 28% c. 50% d. 78% 9. (2 points) Continue previous question, what is the partial charge carried by the anion?

a. +0.28 b. +0.78 c. -0.28 d. -0.56 e. +0.56 10. (2 points) Which of the following has the lowest lattice energy? a. K 2 O b. NaCl c. CaO d. CaS e. Al 2 O 3 11. Choose the correct name for Na 2 HPO 4 : a. Disodium hydrogen phosphate b. Sodium dihydrogen phosphate c. Sodium hydrogen phosphate d. Sodium hypophosphate e. Sodium phosphate 13. (13 points) Draw Lewis structure of H 3 PO 4 . Please use formal charge to find the best Lewis structure. Formal charge = valence electrons – ½ bonding electrons – nonbonding electrons 12.

Name: Quiz 4 Make up quiz 1. ( True /False) NaCl is not a molecular formula for table salt. 2. ( True /False) MgCl 2 has higher lattice energy than NaCl. 3. ( True /False) We only use valence electrons in Lewis Structure. No Core electrons. 4. Provide the correct IUPAC name for BaI₂. a. barium iodide c. barium diiodide b. barium(I) iodide d. barium(II) iodide 5. (2 points each) Write a formula for ionic compound that forms between …………….. a. Manganese(I) ion with a bromate ion MnBrO 3 b. Aluminum ions and phosphite ions Al 2 (PO 3 ) 3 c. Potassium and Iodide KI 6. What is the correct IUPAC name for NiHPO₄? a. nickel(II) hydrogen phosphate c. nickel(I) hydrogen phosphate b. nickel(I) hydrogen phosphite d. nickel phosphate 7. What is the correct IUPAC name for HNO₂(aq)? a. Hydrogen Nitrite c. Nitric Acid b. Nitrous acid d. Hydronitric acid

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8. What is the correct IUPAC name for HOF(aq)? hypofluorous acid 9. What is the correct IUPAC name for FePO₄ · 4H₂O? a. iron phosphate tetrahydrate c. iron(III) phosphate tetrahydrate b. iron(II) phosphate heptahydrate d. iron(II) phosphite tetrahydrate 10. What is the dipole moment of a cation and an anion (q= 1.6x10 -19 C) by a distance of 0.26nm? (μ = qr, 1D = 3.34x10 -30 C.m) a. 1.24D b. 6.2D c. 12.4D d. 62D e. 3.1D 11. (2 points) Continuing previous question, suppose a diatomic molecule with bond length 0.26nm has a dipole moment of 0.35D. What is the percentage of ionic character? b. 5.6% b. 2.8% c. 0.56% d. 32.3% e. 28% Name: ________________ 12. (2 points) Continue previous question, what is the partial charge carried by the anion? a. +0.28 b. +0.56 c. -0.028 d. -0.56 e. -0.32 13. (2 points) Which of the following has the lowest lattice energy? a. KF b. NaCl c. CaO d. CaS

e. CsCl 14. (2 points) What is the formula of sulfuric acid? H 2 SO 4(aq) 15. What is the formula for hydroiodic acid? a. HIO 3(aq) b. HI (aq) c. HIO 2(aq) d. HIO 4(aq) 16. Which of the following has the correct name-formula combination? a. Barium Oxide – BaO c. Lithium nitride – LiN b. Aluminum Sulfide – AlS d. Rubidium Sulfite – Rb 2 S