In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl42-. Co2+(aq) is pink and CoCl42-(aq) is blue.
At Low Temperature the pink color predominates. At High Temperature the blue color is strong.
If we represent the equilibrium as:
COCl4^2-(aq) <--> CO2+(aq) + 4Cl-(aq)

We can conclude that:

1. This reaction is:

a. Exothermic
b. Endothermic
c. Neutral
d. More information is needed to answer this question.

2. When the temperature is decreased the equilibrium constant, K:

a. Increases
b. Decreases
c. Remains the same
d. More information is needed to answer this question.

3. When the temperature is decreased the equilibrium concentration of Co2+:

a. Increases
b. Decreases
c. Remains the same
d. More information is needed to answer this question.

c. orbital shape i hope this is correct

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

hope this :