In the very first chapter of this book, we described the scientific approach and put a special emphasis on scientific models or theories. In this chapter, we looked carefully at the Lewis model of chemical bonding. Why is this theory successful? What are some of the limitations of the theory?

In the very first chapter of this book, we described the scientific approach and put a special emphasis on scientific models or theories. In this chapter, we looked carefully at the Lewis model of chemical bonding. Why is this theory successful? What are some of the limitations of the theory?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter6: Covalent Bonding

Section: Chapter Questions

Problem 110QRT

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Consider the following ion: BrO3¯. a) Show the full electron configuration for Br. b) Draw the most correct Lewis structure for BrO3¯ and briefly explain why your Lewis structure is correct. c) If the structure is stabilised by resonance, draw at least one of the possible resonance forms. If it is not stabilised by resonance, briefly explain why. d) What is the electronic geometry of BrO3-? What is its molecular shape? e) Does BrO3 have a dipole moment? Briefly justify your answer. f) On average, would you expect IO3¯ to have longer or shorter bonds than BrO3¯? Briefly explain your answer. g) Which of the following molecules would you expect to have the lowest vapour pressure? Briefly explain your choice. Br HO HO. Br- Compound A Compound B Compound C h) What is the molecular formula for Compound C? What is the empirical formula for Compound C?
Why is this theory successful? Can you name some of the limitations of the theory? Drag the appropriate items to their respective bins. to determine the shape of the molecule or ion to determine the formulas of ionic compounds Lewis theory allows us to account for the paramagnetism of some species (e.g. oxygen) to determine how the bonds in the molecules and ions form to predict what molecules or ions will be stable, which will be more reactive, and which will not exist to account for the low melting points and boiling points of molecular compounds compared to ionic compounds Lewis theory does not allow us Reset Help
1. How can you tell if a compound is covalent? 2. What distinguishes a covalent bond from an ionic bond? 3. How do you know how many valence electrons an atom has? 4. What is electronegativity? Is electronegativity a property of atoms or bonds? 5. What is polarity? Is polarity a property of atoms or bonds? 6. Describe in detail the N-F bond in terms of the relevant electronegativities and polarities. 7. What does VSEPR stand for and how does it allow one to predict the shapes of covalent molecules?
The formula: BrCN what is the 3D Lewis structure with bond angles and all dipole moments? what is the least electronegative element? What is the number of electron regions surrounding the central atom ? is it octet exceeded? what is the genereral formula? Is it polar or non polar molecule? what is the molecular geometry? what is the electron pair geometry?
Step 1 – Write the Lewis structure from the molecular formula.Step 2 – Assign an electron-group arrangement by counting all electron groups (bonding plus nonbonding) around the central atom (or around each centralatom, if more than one central atom in structure).Step 3 – Predict the ideal bond angle from the electron-group arrangement and the effect of any deviation caused by lone pairs or double bonds.Step 4 – Name the molecular shape by counting bonding groups and nonbonding groups separately.Step 5 – Predict whether the molecule is polar or nonpolarStep 6 – Describe the hybridization around the central atom and identify the total number of σ and π bonds in the structure
Consider the following ion: BrO3−. a) Show the full electron configuration for Br. b) Draw the most correct Lewis structure for BrO3− and briefly explain why your Lewis structure is correct. c) If the structure is stabilised by resonance, draw at least one of the possible resonance forms. If it is not stabilised by resonance, briefly explain why. d) What is the electronic geometry of BrO3−? What is its molecular shape? e) Does BrO3− have a dipole moment? Briefly justify your answer. f) On average, would you expect IO3− to have longer or shorter bonds than BrO3−? Briefly explain your answer. g) Which of the following molecules would you expect to have the lowest vapour pressure? Briefly explain your choice. (IMAGE WITH POSSIBILITIES) h) What is the molecular formula for Compound C? What is the empirical formula for Compound C?
Predicting deviations from ideal bond angles Consider the nitrogen trifluoride (NF3) molecule. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the nitrogen-fluorine bonds? Compared to the ideal angle, you would expect the actual angle between the nitrogen-fluorine bonds to be ... 0 口。 (choose one) (choose one) about the same bigger smaller
Consider the following ion: BrO3−. a) Show the full electron configuration for Br. b) Draw the most correct Lewis structure for BrO3− and briefly explain why your Lewis structure is correct. c) If the structure is stabilised by resonance, draw at least one of the possible resonance forms. If it is not stabilised by resonance, briefly explain why. d) What is the electronic geometry of BrO3−? What is its molecular shape? e) Does BrO3− have a dipole moment? Briefly justify your answer. f) On average, would you expect IO3− to have longer or shorter bonds than BrO3−? Briefly explain your answer. g) Which of the following molecules would you expect to have the lowest vapour pressure? Briefly explain your choice. h) What is the molecular formula for Compound C? What is the empirical formula for Compound C? Please andwer f, g and h the image is for g and h
Consider the following ion: BrO3−. a) Show the full electron configuration for Br. b) Draw the most correct Lewis structure for BrO3− and briefly explain why your Lewis structure is correct. c) If the structure is stabilised by resonance, draw at least one of the possible resonance forms. If it is not stabilised by resonance, briefly explain why. d) What is the electronic geometry of BrO3−? What is its molecular shape? e) Does BrO3− have a dipole moment? Briefly justify your answer. f) On average, would you expect IO3− to have longer or shorter bonds than BrO3−? Briefly explain your answer. g) Which of the following molecules would you expect to have the lowest vapour pressure? Briefly explain your choice. h) What is the molecular formula for Compound C? What is the empirical formula for Compound C? please answer c, d and e
Consider the following ion: BrO3−. a) Show the full electron configuration for Br. b) Draw the most correct Lewis structure for BrO3− and briefly explain why your Lewis structure is correct. c) If the structure is stabilised by resonance, draw at least one of the possible resonance forms. If it is not stabilised by resonance, briefly explain why. d) What is the electronic geometry of BrO3−? What is its molecular shape? e) Does BrO3− have a dipole moment? Briefly justify your answer. f) On average, would you expect IO3− to have longer or shorter bonds than BrO3−? Briefly explain your answer. h) What is the molecular formula for Compound C? What is the empirical formula for Compound C?
|| Predicting deviations from ideal bond angles Consider the carbonyl fluoride (CF₂O) molecule. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the carbon-fluorine bonds? Compared to the ideal angle, you would expect the actual angle between the carbon-fluorine bonds to be ... 口。 (choose one) (choose one) about the same bigger smaller
1.You have made structures of NH3 and H2CO molecules in the Part A of your lab report.Both NH3 and H2CO molecules have three electron groups around the central atom.However, their molecular geometries are not the same. Explain this difference. 2. Draw the Lewis electron dot structure for SCl2 and discuss its molecular geometry. IsSCl2 molecule polar or nonpolar? Explain your answer.