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Ch.10 - Chemical Bonding I: The Lewis Model
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 5th EditionCh.10 - Chemical Bonding I: The Lewis Model문제 87a
10장, 문제 87a

Each compound contains both ionic and covalent bonds. Write ionic Lewis structures for each, including the covalent structure for the ion in brackets. Write resonance structures if necessary. a. BaCO3

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1
Identify the components of BaCO_3: barium (Ba), carbonate ion (CO_3^{2-}).
Recognize that BaCO_3 is composed of Ba^{2+} and CO_3^{2-} ions, where Ba^{2+} is the cation and CO_3^{2-} is the anion.
Draw the Lewis structure for the carbonate ion (CO_3^{2-}): start with a central carbon atom bonded to three oxygen atoms, and distribute the 24 valence electrons (4 from carbon, 6 from each oxygen, and 2 extra for the 2- charge) to satisfy the octet rule.
Consider resonance structures for CO_3^{2-}: distribute the double bond among the three oxygen atoms, resulting in three equivalent resonance structures.
Combine the ionic and covalent structures: represent Ba^{2+} as a separate ion and enclose the covalent structure of CO_3^{2-} in brackets, indicating the ionic interaction between Ba^{2+} and CO_3^{2-}.

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주요 개념

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Ionic Bonds

Ionic bonds are formed through the electrostatic attraction between positively and negatively charged ions. In the case of BaCO3, barium (Ba) donates two electrons to become Ba²⁺, while the carbonate ion (CO3²⁻) accepts these electrons, resulting in a stable ionic compound. Understanding ionic bonding is crucial for drawing accurate Lewis structures.
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가이드 코스
01:49
Chemical Bonds

Covalent Bonds

Covalent bonds occur when two atoms share electrons to achieve a full outer shell, leading to stability. In the carbonate ion (CO3²⁻), carbon shares electrons with three oxygen atoms, forming covalent bonds. Recognizing how covalent bonds function within polyatomic ions is essential for constructing their Lewis structures.
추천 영상:
가이드 코스
02:03
Chemical Bonds

Resonance Structures

Resonance structures are different ways of drawing the same molecule that illustrate the delocalization of electrons. For the carbonate ion (CO3²⁻), resonance structures show that the double bond between carbon and oxygen can be placed between any of the three oxygen atoms. This concept is important for accurately representing the electron distribution in Lewis structures.
추천 영상:
가이드 코스
01:42
Resonance Structures
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