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Ch.16 - Chemical Equilibrium
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 5th EditionCh.16 - Chemical EquilibriumProblema 52
Capitolo 16, Problema 52

Consider the reaction and the associated equilibrium constant: aA(g) + bB(g) ⇌ cC(g) with Kc = 5.0. Find the equilibrium concentrations of A, B, and C for the given values of a, b, and c. Assume that the initial concentrations of A and B are each 1.0 M and that no product is present at the beginning of the reaction. Calculate the equations for x without solving them for the following cases: a) a=1, b=1, c=2; b) a=1, b=1, c=1; c) a=2, b=1, c=1.

Guida verificata passo dopo passo
1
Identify the balanced chemical equation for each case and write the expression for the equilibrium constant Kc.
Set up an ICE (Initial, Change, Equilibrium) table for each case to track the changes in concentrations of A, B, and C.
Express the equilibrium concentrations in terms of the change variable x, where x is the amount of A and B that reacts.
Substitute the equilibrium concentrations into the Kc expression for each case.
Solve the resulting equation for x, but do not calculate the final value.

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Equilibrium Constant (Kc)

The equilibrium constant (Kc) is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium for a given reaction at a specific temperature. It is calculated using the formula Kc = [C]^c / ([A]^a * [B]^b), where [A], [B], and [C] are the molar concentrations of the reactants and products. A Kc value greater than 1 indicates that products are favored at equilibrium, while a value less than 1 suggests that reactants are favored.
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Equilibrium Constant Expressions

ICE Table

An ICE table (Initial, Change, Equilibrium) is a tool used to organize the concentrations of reactants and products in a chemical reaction at different stages. It helps in determining the changes in concentration as the reaction progresses towards equilibrium. By filling in the initial concentrations, the changes that occur as the reaction shifts, and the equilibrium concentrations, one can derive expressions for the unknowns in the reaction.
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ICE Charts and Equilibrium Amount

Stoichiometry

Stoichiometry involves the quantitative relationships between the amounts of reactants and products in a chemical reaction, based on the balanced chemical equation. It allows for the calculation of how much of each substance is consumed or produced during the reaction. Understanding stoichiometry is essential for setting up the equations for equilibrium concentrations, as it dictates the proportions in which reactants and products interact.
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Stoichiometry Concept
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