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Molecular geometry and polarity.docx - Molecular geometry...

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Molecular geometry and polarity Name: Lab Partner: CHEM 1251L-393 11/5/2017
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Lab report: Molecular geometry and polarity Objective: the purpose of this experiment is to determine how molecular polarity is affected by molecular geometry. Introduction: Bond that is formed by sharing of electron pair between the atoms. This electron pair may or may not be equally distributes between the atoms. If the electron pair is equally distributing between the atoms then it is called non-polar covalent bond. But if the electron is not equally distributing between the two atoms and more towards electronegative atom then a polarity generates between the atoms thus this bond is called polar covalent bond. Polar covalent compounds create dipoles. If the dipoles are symmetrically arranged around the central atom then these dipoles cancel the effect of each other and the molecule is non-polar in nature. But if the atoms are arranged around the central atom in such a manner that the dipoles don’t cancel the effect of each other then it is polar in nature. (VSEPR) Valence shell electron pair repulsion theory predicts the arrangement of atoms around the central atoms. Geometry of molecules depend upon the number of bonding electrons and number of lone pairs. This theory tells us about the geometry of molecules and angles present between molecules. According to VSEPR theory, both lone pair and bond pair participate in determining the structure. The electron pairs arranged around the central polyvalent atom in such a way that they remain at maximum distance in order to keep repulsion minimum. The electron pairs of lone pair occupy more space than the bond pairs. The
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