Post lab 4

.pdf

School

Temple University *

*We aren’t endorsed by this school

Course

002

Subject

Chemistry

Date

Jan 9, 2024

Type

pdf

Pages

Uploaded by kamilailhomova24

HSO4(aq) + H20(l)-> H3O+ (aq) + SO4^-2(aq) 1. When adding sodium sulfate solution, how did the color of the equilibrium mixture change? Initially it started out as a light pink but when adding sodium sulfate it turned into a light orange color. a. The color change indicated a shift in the point of equilibrium. In which direction did the equilibrium shift? (L) left (R) right (N) no change b. Explain your answer to question 1a. You should indicate which ion was added to or removed from the equilibrium mixture. When sodium sulfate was added to the product side, the reaction was product favored causing the reaction to shift right. 2. When adding sodium hydrogen sulfate crystals, how did the color of the equilibrium mixture change? When adding the sulfate crystals the mixture went from a light pink to a darker pink, almost rose. a. The color change indicated a shift in the point of equilibrium. In which direction did the equilibrium shift? (L) left (R) right (N) no change b. Explain your answer to question 2a. You should indicate which ion was added to or removed from the equilibrium mixture. When adding the crystal the mixture got darker and therefore it got more acidic causing there to be more products. 3. Upon heating in which direction is the equilibrium shifting? (L) left (R) right (N) no shift 4. Upon cooling in which direction is the equilibrium shifting? (L) left (R) right (N) no shift 5. Is the forward reaction A. endothermic B. exothermic C. insufficient info

6. Explain your answers to questions 3, 4, and 5. When adding a stressor such as heat the reaction tends to make products. The reaction becomes endothermic as it takes in heat causing it to be a left shift. The opposite reaction happens in the cold. The reaction slows down and releases energy which makes it an exothermic reaction. Therefore it is a right shift reaction. During a forward reaction it uses up the reactants and it releases energy which makes it an exothermic reaction. Equation MgOH2-> Mg2+(ag)+2OH-(aq) 7. When adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? When adding hydrochloric acid the color turned to a light pink color. a. The change in appearance indicated a shift in the point of equilibrium. In which direction did the equilibrium shift? (L) left (R) right (N) no shift b. Explain your answer to question 7a. You should indicate which ion was added to or removed from the equilibrium mixture. It was a left shift reaction because when adding concentrated hydrochloric acid to the products side it causes the products to be favored making it a left shift. 8. When adding EDTA, how did the appearance of the equilibrium mixture change? When the EDTA was added the mixture seems to get clearer than it was before. a. The change in appearance indicated a shift in the point of equilibrium. In which direction did the equilibrium shift? (L) left (R) right (N) no shift b. Explain your answer to question 8a. You should indicate which ion was added to or removed from the equilibrium mixture. When adding EDTA the precipitate went away in the mixture therefore taking away the products and making the reactants favored. 9. Upon heating in which direction is the equilibrium shifting? (L) left (R) right (N) no shift 10. Upon cooling in which direction is the equilibrium shifting?

(L) left (R) right (N) no shift 11. Is the forward reaction A. endothermic B. exothermic C. insufficient info 12. Explain your answers to questions 9, 10, and 11. When the stressor of heat is added products tend to be favored as the result making it a left shift reaction. Opposite to that as cold is added and energy is being released then reactants tend to be favored which makes it a right shift. Overall the forward reaction is exothermic since during the reaction the system loses energy to make the products. Equation 13. When adding silver nitrate solution, how did the color of the equilibrium mixture change? It changed from blue to pink a. The color change indicated a shift in the point of equilibrium, in which direction did the equilibrium shift? (L) left (R) right (N) no shift b. Explain your answer to question 13a. You should indicate which ion was added to or removed from the equilibrium mixture. Since silver nitrate (AgNo3) is an ionic compound (metal and nonmetal), it will dissociate into ions. Ag+ and No3- will be added to the equilibrium mixture. Cl- would be removed because of the added Ag+. 14. When adding hydrochloric acid, how did the color of the equilibrium mixture change? It changed from pink to blue a. If a color change indicated a shift in the point of equilibrium. In which direction is the equilibrium shifting? (L) left (R) right (N) no shift

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Recommended textbooks for you

Chemistry & Chemical Reactivity

Chemistry

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:Cengage Learning

Chemistry & Chemical Reactivity

Chemistry

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:Cengage Learning

Chemistry

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Cengage Learning

Chemistry: An Atoms First Approach

Chemistry

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Cengage Learning

Chemistry

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Cengage Learning

Introduction to General, Organic and Biochemistry

Chemistry

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Cengage Learning

SEE MORE TEXTBOOKS

Recommended textbooks for you

Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Chemistry: An Atoms First Approach
Chemistry
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Cengage Learning
Chemistry
Chemistry
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Cengage Learning
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning