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orchidminnow140Lv1

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In a second test, the student placed a tet tube containing apink equilibrium mixture in a hot-water bath. The solution turnedblue. When the student removed the test tube from the hot-waterbath and placed it in an ice-water bath, the solution turnedpink.

a. is the forward reaction in the[CoCL₄]^2-ion/[Co(H₂O)₆]²⁺ionequilibrium exothermic or endothermic?

b. Briefly explain how the student's observarions support youranswer to( a.)

c.Write the net ionic equation for this equilibrium, includingheat.

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Related questions

Tetrachlorocobalt (II) ion reacts with water to form hexaaquacobalt (II) ion according to the following net ionic equation:
[CoCl₄]²^-(aq, blue) + 6 H₂O(l) <=> [Co(H₂O)₆]²⁺(aq, pink) + 4 Cl^-(aq)

(A) A student doing this experiment placed a test tube containing a blue equilibrium mixture in an ice-water bath. The solution turned pink. When the student removed the test tube from the ice-water bath and placed it in the hot water bath, the solution turned blue. Is the forward reaction exothermic or endothermic? Give complete explanation.

(B) What change do you observe when you add concentrated hydrochloric acid, HCl, solution. HCl undergoes dissociation according the following equation: Give complete explanation.

HCl(aq) â H⁺(aq) + Cl^-(aq)

(C) What experimental evidence do you have that the equilibrium is affected by the addition of water. Give complete explanation.

arobability went that is cent All that apply, at apply) 197 (Circle one). Explain why the answer you centration with Saturated solution: x Obtain approximately 4 ml of a saturated NaCl solution. Add 5 drops of 12M HCl solution. (caution: 12M HCI is not your friend!) 3. Record Observations Chunky white glec,qidak, solukan Temperature: stays clear X Place approximately 3 ml of a 0.1M Coci, solution in methanol into a test tube. A Place the test tube in a hot water bath (hot but not boiling) in the fume hood and record your observations. 2. Remove the test tube from the hot water bath and allow to cool to near room temperature. * Place the test tube in an ice bath and record your observations. * Allow the test tube and solution to return to room temperature for the next part. EP) 1.3 0.40 Concentration: K to your Coci, solution add the provided 12M HCl solution dropwise until a change is observed. Mix well between drops. To this solution add water dropwise until an observation is observed. Mix well between drops. 6. Dispose of the cobalt solution in the beaker in the hood. This will be placed in the heavy metal waste container by the TA. Dort puse , blue on the botteru dor E blue Pressure and volume wl Hio: heally Ligh Pok A In the fume hood there are syringes with 30 mVof NO, in them. Keep them in the hood for the experiment as NO, is a toxic gas. 2. Before you begin take note of the color of the gas in the syringe. You will be compressing it to one half its original volume. If no reaction occurs, then the color should be twice as dark. If more NO, is formed when it is compressed, it will be more than twice as dark, while if some of the NO, is converted to N.O. then it will not be twice as dark. If you look quickly, you will see that the gas initially gets dark due to the compression, then turns lighter or darker due to the shift in equilibrium. 3. Quickly push on the plunger to compress the gas to 15ml- make observations. 4. Return the plunger to the 30ml, mark. 6. Place the syringe in the ice water bath keeping the volume at 30 mL - make observations. 6. Leave the syringe for the next group. Page 8 of 12

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