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CONCEPT CHECK (8 points) Name:, In this section, you will be tested on your understanding of key concepts of chemical equilibrium. It is recommended to discuss this section with your lab partner or a classmate and complete it together. Check all that apply. For each quantity (K, k,[], and rate) in questions 1 to 4, there is at least one correct option (that means there can be more than one correct answer). Full credit is only awarded if all correct answers are selected. 1) At 25 °C, two species, A and B, are at equilibrium: What does this information tell you about the following quantities? Equilibrium constant, K: 05-0 A(aq)=B(aq) □ K-1 K>1 □ 0k Not enough information given Concentrations, [A] and [B]: [A]-[B] □ [A] > [B] Rates, rated and rate rate -rate (rates kA) and rate-k...[B]) < [A]<[B] [A] and [B] remain constant Orated>rate Orateswa 1 Rate constants, kwd and krev: Ok-k Ok Ok rate VA] and [B] remain constant Orated rate both rates have increased 4) If this reaction was exothermic and the equilibrium mixture from part 3 was cooled to 5 °C, which of the following options apply when the mixture is at equilibrium again? Compared to before the mixture was cooled... Equilibrium constant, K Khas increased OK has not changed OK has decreased Rate constants, kfwd and krev: kwd has increased Krev has increased ktwd-Krev kwa has not changed krev has not changed ktwd> Krev kwd has decreased krev has decreased Okewd raterev both rates have increased both rates have decreased only ratefwd has increased P W 5

CONCEPT CHECK (8 points) Name:, In this section, you will be tested on your understanding of key concepts of chemical equilibrium. It is recommended to discuss this section with your lab partner or a classmate and complete it together. Check all that apply. For each quantity (K, k,[], and rate) in questions 1 to 4, there is at least one correct option (that means there can be more than one correct answer). Full credit is only awarded if all correct answers are selected. 1) At 25 °C, two species, A and B, are at equilibrium: What does this information tell you about the following quantities? Equilibrium constant, K: 05-0 A(aq)=B(aq) □ K-1 K>1 □ 0k Not enough information given Concentrations, [A] and [B]: [A]-[B] □ [A] > [B] Rates, rated and rate rate -rate (rates kA) and rate-k...[B]) < [A]<[B] [A] and [B] remain constant Orated>rate Orateswa 1 Rate constants, kwd and krev: Ok-k Ok Ok rate VA] and [B] remain constant Orated rate both rates have increased 4) If this reaction was exothermic and the equilibrium mixture from part 3 was cooled to 5 °C, which of the following options apply when the mixture is at equilibrium again? Compared to before the mixture was cooled... Equilibrium constant, K Khas increased OK has not changed OK has decreased Rate constants, kfwd and krev: kwd has increased Krev has increased ktwd-Krev kwa has not changed krev has not changed ktwd> Krev kwd has decreased krev has decreased Okewd raterev both rates have increased both rates have decreased only ratefwd has increased P W 5

Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter17: Equilibrium
Section: Chapter Questions
Problem 10CR: . Explain what it means that a reaction has reached a state of chemical equilibrium. Explain why...
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CONCEPT CHECK (8 points) Name:, In this section, you will be tested on your understanding of key concepts of chemical equilibrium. It is recommended to discuss this section with your lab partner or a classmate and complete it together. Check all that apply. For each quantity (K, k,[], and rate) in questions 1 to 4, there is at least one correct option (that means there can be more than one correct answer). Full credit is only awarded if all correct answers are selected. 1) At 25 °C, two species, A and B, are at equilibrium: What does this information tell you about the following quantities? Equilibrium constant, K: 05-0 A(aq)=B(aq) □ K-1 K>1 □ 0<K<1 Not enough information given Rate constants, kid and ke kwe-km □ kon>k Not enough information given Concentrations, [A] and [B]: [A]-[B] □ [A] > [B] Rates, rated and rate rate -rate (rates kA) and rate-k...[B]) < [A]<[B] [A] and [B] remain constant Orated>rate Orateswa <rate 2) The equilibrium mixture of species A and B was analyzed and turned out to contain 100 times more B than A. With this new piece of information, consider all options again: Equilibrium constant, K: □ K-0 □ 0<K<1 □ K-1 ⒸK>1 Rate constants, kwd and krev: Ok-k Ok Ok <kee Concentrations, [A] and [B]: [A]-[B] [A][B] [A]<[B] KAJ an Rates, rateve and rate: rated rate Orates>rate VA] and [B] remain constant Orated <rate 3) If some A was added to the mixture from part 2 at equilibrium, which of the following options apply when the mixture is at equilibrium again? Compared to before some A was added... Equilibrium constant, K: Khas increased Khas not changed OK has decreased Rate constants, ktwd and krev: Oktd has increased fwd has not changed Concentrations, [A] and [B]: [A] and [B] have not changed both [A] and [B] have increased Rates, rated and ratere rated rate only [A] has increased only [B] has increased rated> rate both rates have increased
Transcribed Image Text:CONCEPT CHECK (8 points) Name:, In this section, you will be tested on your understanding of key concepts of chemical equilibrium. It is recommended to discuss this section with your lab partner or a classmate and complete it together. Check all that apply. For each quantity (K, k,[], and rate) in questions 1 to 4, there is at least one correct option (that means there can be more than one correct answer). Full credit is only awarded if all correct answers are selected. 1) At 25 °C, two species, A and B, are at equilibrium: What does this information tell you about the following quantities? Equilibrium constant, K: 05-0 A(aq)=B(aq) □ K-1 K>1 □ 0<K<1 Not enough information given Rate constants, kid and ke kwe-km □ kon>k Not enough information given Concentrations, [A] and [B]: [A]-[B] □ [A] > [B] Rates, rated and rate rate -rate (rates kA) and rate-k...[B]) < [A]<[B] [A] and [B] remain constant Orated>rate Orateswa <rate 2) The equilibrium mixture of species A and B was analyzed and turned out to contain 100 times more B than A. With this new piece of information, consider all options again: Equilibrium constant, K: □ K-0 □ 0<K<1 □ K-1 ⒸK>1 Rate constants, kwd and krev: Ok-k Ok Ok <kee Concentrations, [A] and [B]: [A]-[B] [A][B] [A]<[B] KAJ an Rates, rateve and rate: rated rate Orates>rate VA] and [B] remain constant Orated <rate 3) If some A was added to the mixture from part 2 at equilibrium, which of the following options apply when the mixture is at equilibrium again? Compared to before some A was added... Equilibrium constant, K: Khas increased Khas not changed OK has decreased Rate constants, ktwd and krev: Oktd has increased fwd has not changed Concentrations, [A] and [B]: [A] and [B] have not changed both [A] and [B] have increased Rates, rated and ratere rated rate only [A] has increased only [B] has increased rated> rate both rates have increased
4) If this reaction was exothermic and the equilibrium mixture from part 3 was cooled to 5 °C, which of the following options apply when the mixture is at equilibrium again? Compared to before the mixture was cooled... Equilibrium constant, K Khas increased OK has not changed OK has decreased Rate constants, kfwd and krev: kwd has increased Krev has increased ktwd-Krev kwa has not changed krev has not changed ktwd> Krev kwd has decreased krev has decreased Okewd <keev Concentrations, [A] and [B]: [A] and [B] have not changed [A] has increased [B] has increased Rates, ratefwd and raterev: ratefwd raterev Oratetwd>raterev both rates have increased both rates have decreased only ratefwd has increased P W 5
Transcribed Image Text:4) If this reaction was exothermic and the equilibrium mixture from part 3 was cooled to 5 °C, which of the following options apply when the mixture is at equilibrium again? Compared to before the mixture was cooled... Equilibrium constant, K Khas increased OK has not changed OK has decreased Rate constants, kfwd and krev: kwd has increased Krev has increased ktwd-Krev kwa has not changed krev has not changed ktwd> Krev kwd has decreased krev has decreased Okewd <keev Concentrations, [A] and [B]: [A] and [B] have not changed [A] has increased [B] has increased Rates, ratefwd and raterev: ratefwd raterev Oratetwd>raterev both rates have increased both rates have decreased only ratefwd has increased P W 5
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