Domanda del libro di testo
Write 'true' or 'false' for each statement. (a) We balance chemical equations as we do because energy must be conserved.
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Ch.3 - Chemical Reactions and Reaction Stoichiometry
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
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Brown 15th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 10
Brown 15th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 10Capitolo 3, Problema 10
A key step in balancing chemical equations is correctly identifying the formulas of the reactants and products. For example, consider the reaction between calcium oxide, CaO(s), and H2O1l2 to form aqueous calcium hydroxide. (b) Is it possible to balance the equation if you incorrectly identify the product as CaOH1aq2, and if so, what is the equation?
Guida verificata passo dopo passo1
Identify the correct chemical formulas for the reactants and the incorrectly identified product: CaO(s), H_2O(l), and CaOH(aq).
Write the unbalanced chemical equation using these formulas: CaO(s) + H_2O(l) \(\rightarrow\) CaOH(aq).
Count the number of each type of atom on both sides of the equation. For the reactants, you have 1 Ca, 1 O, and 2 H atoms. For the product, you have 1 Ca, 1 O, and 1 H atom.
To balance the equation, adjust the coefficients to ensure the same number of each type of atom appears on both sides. Since the product has only 1 H atom, you need to balance the hydrogen atoms by adjusting the coefficient of H_2O.
Re-evaluate the equation after adjusting coefficients to ensure all atoms are balanced, and verify that the equation is consistent with the law of conservation of mass.
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Chemical Formulas
Chemical formulas represent the composition of substances, indicating the types and numbers of atoms present. Accurate identification of reactants and products is crucial in chemical reactions, as incorrect formulas can lead to misunderstandings in the reaction process and the final balanced equation.
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02:26
Skeletal Formula
Balancing Chemical Equations
Balancing chemical equations involves ensuring that the number of atoms for each element is the same on both sides of the equation. This reflects the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. An incorrect product formula can complicate this process, potentially leading to an unbalanced equation.
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01:32Balancing Chemical Equations
Hydroxide Ion Formation
In the context of the reaction between calcium oxide and water, the formation of hydroxide ions (OH-) is essential. The correct product, calcium hydroxide (Ca(OH)2), contains two hydroxide ions, which are crucial for the compound's properties. Misidentifying the product as CaOH could lead to confusion regarding the stoichiometry and the resulting chemical behavior.
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06:17Ion Formation
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