By Andrei Straumanis
Natural Chemistry, A Guided Inquiry is designed to be used as a complement to a standard textual content to motivate energetic and collaborative studying within the lecture room. A spouse to full-year natural chemistry classes, this pupil job ebook comprises new tools for educating chemistry that replicate present study on how scholars examine. the aim of the guided inquiry method is to educate scholars to imagine analytically and collaboratively in groups, like scientists do, instead of instructing them to memorize vital conclusions arrived at via nice scientists of the previous. by way of having a look rigorously at new difficulties, developing logical conclusions in accordance with observations, and discussing the benefits in their conclusions with friends, scholars increase a better conceptual realizing of and appreciation for the fabric. Honing their logical and empirical abilities allows scholars to raised pursue not just chemistry, yet the other complicated units of rules.
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Additional resources for Organic Chemistry: A Guided Inquiry
Sample text
ChemActivity 3: Electron Orbitals Consider the incomplete orbital representation of O2, below right. a. Identify which lobes are hybrid orbitals (identify the type) and which lobes are p orbitals. b. Use dotted lines to show any π bonds. c. Use up or down arrows to show electron occupation of each hybrid orbital or bond. A double bond consists of one σ overlap and one π overlap. σ bond (or vice versa) O O π bond (or vice versa) Orbital Drawing of O2 Lewis Drawing of O2 5. Consider the following orbital representation of HCCH (ethyne).
15. Construct an explanation for why an H attached to an N or O atom can participate in a hydrogen bond (H-bond) while an H attached to a carbon atom cannot. 16. Circle each molecule below that you expect to be capable of hydrogen bonding to itself. O O R NH2 C N H HO C H2 H2 C CH3 C C H2 HO OH HOCH3 C H2 O H2 C H3C Cl C H2 H Cl H2 C H3C H2 C O CH3 C CH3 H C H2 17. An “hydrogen-bond donor” has an H suitable for hydrogen bonding. An “hydrogen-bond acceptor” has a lone pair suitable for hydrogen bonding.
B. C atom? N atom? O atom? Consider the molecules AlCl3 (aluminum chloride) and CF4 (carbon tetrafluoride). a. Draw the valence shell representation of each. b. Predict the value of the XYX bond angle, and explain your reasoning. 5 o; then draw a different bent molecule with a bond angle of about 120 o. 14 7. 5o or 90o. (circled charges indicate the charge on the molecule or fragment) H H C H H F H O H H N H H O O H H N H H 8. Make a model of each of the following molecules: Cl H O H Cl N Cl H H C H H C C C H H H C H C H C H H H H 9.