Lab Chemical Structures - linked in Canvas.docxLab Lewis Structures & Structural FormulasPurpose● In this exercise we will investigate Lewis Structures, Structural Formulas and...

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Answered Same DayJan 17, 2023

Answer To: Lab Chemical Structures - linked in Canvas.docxLab Lewis Structures & Structural...

Aditi answered on Jan 17 2023
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Lab Chemical Structures - linked in Canvas.docx
Lab Lewis Structures & Structural Formulas
Purpose
· In this exercise we will investigate Lewis Structures, Structural Formulas and Condensed Structural Formulas, how to draw them, how to interpret them and how 2D and 3D representations of chem
icals look different or similar.
· We will also be introduced to the concept of isomers.
Learning objectives are:
· Convert Lewis Structures to a chemical formula and vice versa.
· Convert Structural Formulas to a chemical formula and vice versa.
· Convert Structural Formulas to Condensed Structural formulas and vice versa.
· Distinguish between Structural Formulas and Lewis Structures.
· Predict what constitutional isomers are possible for a compound with a given chemical formula.
· Differentiate between a 2D representation of a molecule and the actually 3D arrangement of atoms in the molecule.
Knowledge
This assignment will help you review & strengthen knowledge on the following content: o    Common bond number
· How to draw Lewis Structures
· Valence electrons and VSEPR (valence shell electron pair repulsion) theory
Skills
After this assignment you should be able to:
a. Differentiate between Lewis Structures, Structural Formulas & Condensed Structural Formulas.
b. Make predictions about what isomers of a chemical formula will form.
c. Interpret 2D chemical formulas to determine what their 3D shape should be based on VSEPR theoery
Criteria for Passing Grade
In order to achieve a passing grade student must do the following as a minimum:
· Make detailed observations during the completion of the procedure above.
· Answer all of the questions using detailed, complete answers with clear reasoning and evidence used as necessary to support your answer.
· Complete all answers in their own words.
· It is recommended to compare your lab results with other lab teams. Just be sure all your answers are your own original thoughts and in your own words.
Introduction
The study of organic chemistry involves almost exclusively molecular substances, i.e., compounds in which the bonds connecting the atoms are covalent. In a covalent bond one or more electron pairs are shared by two atoms. To show covalent bonds in a molecule, begin with the electron dot structures for the individual atoms and then put all the atoms together so that each atom achieves a completely filled outer shell. Remember that a completely filled outer shell for hydrogen contains 2 electrons and for most other elements contains 8 electrons.
Lewis Structures
Example: Draw a Lewis structure for water H2O. Note that H2O is sometimes referred to as a molecular formula.
The correct arrangement of atoms in the Lewis Structure is:
Lone pairs are shown with 2 dots, shared electron pairs are shown as a line connecting the two atoms. Double bonds are shown with two lines connecting the atoms in the bond. Triple bonds are shown with two lines...
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