Domanda del libro di testo
Five of the boxes in the following periodic table are colored. Predict the charge on the ion associated with each of these elements.
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Ch.2 - Atoms, Molecules, and Ions
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 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.
Guida verificata passo dopo passo1
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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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.
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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.
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02:26Skeletal 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.
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01:53Formal Charge
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A 1.0-g sample of carbon dioxide (CO2) is fully decomposed into its elements, yielding 0.273 g of carbon and 0.727 g of oxygen. (a) What is the ratio of the mass of O to C?
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Domanda del libro di testo
In the Millikan oil-drop experiment (see Figure 2.5), the tiny oil drops are observed through the viewing lens as rising, stationary, or falling, as shown here. (a) What causes their rate of fall to vary from their rate in the absence of an electric field?
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Domanda del libro di testo
Which of the following diagrams most likely represents an ionic compound, and which represents a molecular one? Explain your choice.
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Domanda del libro di testo
A 1.0-g sample of carbon dioxide (CO2) is fully decomposed into its elements, yielding 0.273 g of carbon and 0.727 g of oxygen. (b) If a sample of a different compound decomposes into 0.429 g of carbon and 0.571 g of oxygen, what is its ratio of the mass of O to C?
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