Hi

I have HW in chemistry class, they are 5 Qs and I need the full answers to give them to my teacher, Just watch the videos and answers the Qs

https://www.youtube.com/watch?v=oEcySAiwyCM&feature=youtu.be

https://www.youtube.com/watch?v=CPVKgwp_sCs&feature=youtu.be

QUESTION 1

1. Equilibrium reaction:
2. Co(H₂O)₆²⁺ (aq) + 4Cl^– (aq) CoCl₄^2– (aq) + 6H₂O (l) ∆H > 0
3. What is the color of Co(H₂O)₆²⁺ solution?
4. What is the color of CoCl₄^2– solution?

QUESTION 2

1. Effect of changing the concentration of waterComplete the following table:

   Tube	Solvent	Solution color	Predominant cobalt species
   1	Water
   2	50% water: 50% ethanol
   3	20% water: 80% ethanol
   4	5% water: 95% ethanol
   5	Ethanol

QUESTION 3

1. Based on the changing concentrations of water in this system, explain how the results correspond to Le Chatelier’s principle (i.e., As the water concentration decreases, how does the chemical system reestablish equilibrium?)

QUESTION 4

1. Effect of changing the concentration of chloride ionComplete the table below:In water as a solvent:

   HCl (mL)	0.0	1.0	2.0	3.0	4.0	5.0	6.0	7.0	8.0
   Color

   In ethanol as a solvent

   HCl (drops)	0	1	2	3	4	5	6	7	8
   Color:

QUESTION 5

1. Effect of changing temperature

   Temperature of water bath (°C)	Solution color	Predominant cobalt species

QUESTION 6

1. We know that according to Le Chaterlier’s principle that an increase in temperature causes the endothermic reaction to occur in our cobalt system. Based on the color changes you observe, is this statement supported for the cobalt complex ion system? Explain.

QUESTION 7

1. Would the value of K (the equilibrium constant) increase, decrease, or stay the same for this reaction if heated were applied. Explain

QUESTION 8

1. Is the reverse reaction of this reaction endothermic or exothermic?