In this activity we will learn how to draw Lewis structures, calculate formal charge and examine resonance. We will also observe the Octet rule and exceptions to this rule. AP Chem. Lewis Dot Structure Worksheet. Write Lewis Dot Structures and calculate the formal charges for the following compounds: 1. SO2 18. H2O2. CO3-2 19. C2H6. NH3 20. CH3OH resonance delocalization. The pK a of the α-protons of aldehydes and ketones is in the range of 16-20 (Table 18.1, p. 754) ethane acetone ethanol pK a= 50-60 pK a= 19 pK a= 16 H 3CCH 3 C O H 3CCH H 3CH2COH CC O H CC O CC C CH O B C C O C C O Enolate a nion + +H-B crbonyl!+! -!+ inductive effect resonance effect
8.11 Exceptions to the Octet Rule 358 8.12 Resonance 362 8.13 Molecular Structure: The VSEPR Model 6 Thermochemistry 228 6.1 The Nature of Energy 229 6.2 Enthalpy and Calorimetry 235 CHEMICAL IMPACT Nature Has Hot Plants 238 Byjus.com Resonance structures are sets of Lewis structures that describe the delocalization of electrons in a polyatomic ion or a molecule. In many cases, a single Lewis structure fails to explain the bonding in a molecule/polyatomic ion due to the presence of partial charges and fractional bonds in it.
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