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Ch.2 - Atoms, Molecules, and Ions
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.2 - Atoms, Molecules, and Ions문제 8
2장, 문제 8

The following diagram represents an ionic compound in which the red spheres represent cations and the blue spheres represent anions. Which of the following formulas is consistent with the drawing? KBr, K2SO4, Ca1NO322, Fe21SO423.
Diagram of an ionic compound with red cations and blue anions for chemistry question.

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1
Identify the colors representing cations and anions in the diagram. Here, the red spheres represent cations and the blue spheres represent anions.
Count the number of cations and anions in the diagram. There are 8 cations (red spheres) and 8 anions (blue spheres).
Determine the ratio of cations to anions. The ratio is 1:1 since there are equal numbers of cations and anions.
Compare the ratio with the given formulas: KBr, K2SO4, Ca(NO3)2, Fe2(SO4)3. Only KBr has a 1:1 ratio of cations to anions.
Conclude that the formula consistent with the drawing is KBr.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Ionic Compounds

Ionic compounds are formed through the electrostatic attraction between cations (positively charged ions) and anions (negatively charged ions). In the given diagram, the red spheres represent cations, while the blue spheres represent anions, illustrating the typical structure of ionic compounds where these oppositely charged ions arrange themselves in a lattice to minimize energy.
추천 영상:
가이드 코스
02:11
Ionic Compounds Naming

Chemical Formulas

Chemical formulas represent the composition of a compound, indicating the types and ratios of atoms present. For ionic compounds, the formula reflects the balance of charges between cations and anions. For example, KBr consists of one potassium ion (K+) and one bromide ion (Br-), while K2SO4 contains two potassium ions and one sulfate ion, demonstrating the need for charge neutrality in the compound.
추천 영상:
가이드 코스
02:26
Skeletal Formula

Charge Balance

Charge balance is a fundamental principle in determining the formula of ionic compounds. The total positive charge from cations must equal the total negative charge from anions to achieve electrical neutrality. In analyzing the options provided, one must ensure that the ratio of cations to anions reflects this balance, which is crucial for identifying the correct formula consistent with the ionic compound depicted in the diagram.
추천 영상:
가이드 코스
01:53
Formal Charge
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