Log in
Chemistry
1
answer
0
watching
1,391
views
13 Dec 2019

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) → H+(aq) + Cl-(aq)

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

Watch
1
answer
0
watching
1,391
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Patrina Schowalter
Patrina SchowalterLv2
17 Dec 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

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.


Studying the (CoCl4)^2 / (Co(H2O)6)^2+ Equilibrium.
-color of original equilibrium
dark-blue
-color change after addition of distilled water
lighter shade of dark blue
- color change after addition of 12M HCl
sky-blue
- color change after addition of distilled waster
lavender
-color change after heating mixture
light blue
- color change after cooling mixture
darker shade of purple.





(CoCl4)^2- (aq, blue) + 6H2O (l)= (Co(H2O)6)^2+ (aq, pink)+ 4Cl^-(aq)

6) Use Le Chateliers principle to account for the color change youobserved when you added 12M HCl to the equilibrium mixture
7)Based on your answer to question 6 , would you expect to observethe same color change if you added a saturated NaCl solutioninstead of adding the 12M HCl? Explain.
8) After the equilibrium mixture was cooled in the ice-water bathwhat was the predominant cobalt(II) species present in thesolution, (CoC14)^2 or (Co(H20)6)^2+. explain.
9) Based on your answer to question 8, is the forward reactionexothermic or endothermic? Rewrite the equilibrium reaction toinclude the heat term.

Hi, can someone help me answer these questions? I promise to rate you!!

1. In Le Chatlier's principle, can you describe the reaction between Fe+3 and SCN- with Fe(SCN)+2. The reaction turned reddish brown when Fe+3 and SCN- were mixed together. Where does the equilibrium shift?

2. In Le Chatlier's principle, can you describe the reaction when 0.1 M Ni(NO3)2 and 6 M of NH3 are mixed together. The color changed from light blue to dark blue. After that we added 6 M HCl, the color changed again to a lighter color. Where does the equilibrium shift?

3. In Le Chatlier's prinicple, can you describe the precipitation that occured when NaOH and Ca(NO3)2 were mixed together? Also, after being centrifuged, the solution and the precipitation solid (white) separated. We threw out the liquid and added HCl and NaOH. Where does the equilibrium shift?

4. In Le Chatlier's prinicple, can you describe the reaction that occured when 5 drops of 0.1 M Co(NO3) is added mixed with 5 drops of concentrated HCl. The color changed into pink. When we added water, the color changed into light pink. Then when we boiled it, it turned blue. After cooling, it turned pink again. Where does the equilibrium shift?

5. We took two test tubes, marking one ACID and one is BASE. We added 3 mL of H2O in each. We added 6 drops of 6 M HCl to the acid tubes and a drop of NaOH to the base tube. Then we added 4 drops of the indicator on each (methyl orange- indicator). The acid tube turned into color pink after the indicator and NaOH again was added. The base tube turned yellow after the indicator and HCl solution is added. In Le, Chatlier's principle, can you describe this whole reaction? Where does the equilibrium shifts?

THANK YOU SO MUCH. I KNOW IT'S A LOT, BUT I PROMISE TO RATE YOU!!!

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in