Question

Chemistry 30 Unit D Module 7 Summative Create a data table to record your observations. Describe the stress that was applied to the cobalt(II) chloride equilibrium system, the initial colour of the equilibrium system (before the stress was applied), and the final colour of the equilibrium system. 22. Answer (3 Marks) Use the following additional information to answer the next question. CoCI, (aq) 6H,0()Co(H,0), (aq) +4 CI (aq) +energy pink blue Identify how the following stresses will affect the appearance of this equilibrium system. Will the system turn more pink or more blue in colour? 23. Answer (3 Marks) Stress applied Direction of shift Colour The equilibrium system is placed in an ice water bath Addition of chloride ions A. B. A desiccating agent is added to remove some of the water from the equilibrium C. system Page 12 of 15

Answer 1

The reaction is exothermic, this means that it releases energy when occurring in its direct form, then we respond:

A) If energy is removed with an ice bath, the balance favors the production of products (RIGHT) and the solution turns pink.

B) If Cl- ions are added, a common ion effect occurs with the products and the equilibrium displaces to form reagents (LEFT), the solution turns blue.

C) When removing water from the system, the equilibrium moves to form more water and reagents (LEFT), the solution turns blue.

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