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Ch.19 - Chemical Thermodynamics
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.19 - Chemical Thermodynamics문제 83a
19장, 문제 83a

The value of Ka for nitrous acid (HNO2) at 25 °C is given in Appendix D. (a) Write the chemical equation for the equilibrium that corresponds to Ka.

검증된 단계별 안내
1
Identify the chemical formula for nitrous acid, which is HNO2.
Recognize that the dissociation of an acid in water typically results in the formation of hydrogen ions (H+) and the conjugate base of the acid.
Write the chemical equation for the dissociation of nitrous acid in water: HNO2(aq) ⇌ H+(aq) + NO2-(aq).
Understand that Ka, the acid dissociation constant, quantifies the strength of the acid in solution, indicating how completely the acid dissociates in water.
The equilibrium expression corresponding to this reaction is Ka = [H+][NO2-] / [HNO2], where the concentrations are those at equilibrium.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
1m

주요 개념

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

Acid-Base Equilibrium

Acid-base equilibrium refers to the state in which the concentrations of the reactants and products in an acid-base reaction remain constant over time. For weak acids like nitrous acid (HNO2), this equilibrium involves the dissociation of the acid into its ions, which is characterized by the acid dissociation constant (Ka). Understanding this concept is crucial for writing the correct equilibrium expression.
추천 영상:
가이드 코스
6:47
Triprotic Acid Equilibrium

Acid Dissociation Constant (Ka)

The acid dissociation constant (Ka) quantifies the strength of an acid in solution. It is defined as the ratio of the concentration of the products (the dissociated ions) to the concentration of the undissociated acid at equilibrium. A higher Ka value indicates a stronger acid that dissociates more completely in solution, which is essential for determining the behavior of HNO2 in aqueous solutions.
추천 영상:
가이드 코스
03:50
Characteristics of Ka and Kb

Chemical Equations and Equilibrium Expressions

Chemical equations represent the reactants and products involved in a chemical reaction, while equilibrium expressions mathematically describe the relationship between the concentrations of these species at equilibrium. For HNO2, the equilibrium equation would show the dissociation into H+ and NO2-, allowing for the calculation of Ka. Writing these equations correctly is fundamental for analyzing acid-base reactions.
추천 영상:
가이드 코스
03:20
Equilibrium Constant Expressions
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