Question

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56 G.C.3. Studying the Effect of Changes in Condicions on an Equilbrium System G. C. 2-7: LABORATORY REPORT Name Answer the following questions in your laboratory notebook in complete detail using Le chatelier's prin- ciple to explain and support your observations, include the direction of the reaction shin in all answers. System Na, 1 HC,H,O, H + C6,05 g Solutions pl Observation OIMHCHO, Orange AIM NCHO, +NC,H, O higher Light orange 1. Did the equilibrium shift and in which direction? 2. How did the pH of the solution change after adding NACHO, to it? (Hint: Identify which ion is being added to the solution and how it affects the concentration of other ions present in solution) System No.2: 200,- +2H5 Cro +H.O. Solutions Observations Na CO, solution Yellow Sowtian Nacro, solution - HC Orange Selts Necro, solution + NaOH Ycliou slotion 3. Explain how the equilibrium shifted when you added HCl to the solution? 4. Which chromium ionis orange and which is yellow? How did you know? 5. How did the equilibrium shift when you added NaOH to the solution (Hint: Think about what NaOH will react with and how that result will affect the other components present in the solution) System No. 3: BC +H.0.52H + BIOCI + 20 Solutions Observations 239992POPPPPPPPT BICI, mixed with water white. Sald milky_Schuhe Mixture plus HCI clear solution, no solid Misture diluted with water white solid reappeared 6. Explain how the equilibrium shifted when you dissolved the Bici, in excess water 7. Explain how the equilibrium shifted after the addition of HCI. & Explain how the equilibrium shifted after dilution CCCCCLLLllllllll11171172

Answer 1

System No 1 foi Here imple He to cae) ¥ Hear + Sho(aq) . After adding Naqto the which will ? dissociate as Naçitzo (aq) - Natoon) + Ghzo (94) The equilibrium will shift towards left such that littear] will decrease and pH will increase according to Le chatelier's ye ruits own greer ciple Gre Go D only healt bicyc System No. 2 c - zero + 2H Tan Ž ergo lang + Hore) 3) when Hel is added that will increase the H tag) concentration initially but Ecc the equilibrium will shift towards With right to counter the exeers Ht (af) ion present in the solution to As with addition of Hel more @sozia) will form the colors of eno lag) is orange Pa and ero? cay) is yellow. and eroz-can y 3) If Naditis added to the solution ; NaOH(aq) will roro react with Htcar) present in the solution and co to counter that more H+ (aq) will form and the equilibrium shift towards left.

em No.3 aee Biely (aq) + H, Ore) 7 24 Feaq) + Bioelcs) + percom) 6 Is exeers Bichcaq ) is added the equilibrium will shift towards right according to Le Chatelien's principle. 7) Exeens Hellar) will increase it tear) in the solution as a result the equilibrium will shift towards left. 8) with clilution more Bielzcaq will react to give Bioel(s) as result the equilibrium will shift towar I right.