Addition of Silver Nitrate 1. Based upon the color, in which direction does the

Question

Addition of Silver Nitrate

1. Based upon the color, in which direction does the equilibrium shift?

Shifts Left.

2. Write an equation showing what happens when AgNO3 is added, and explain why the equilibrium shifts.

Addition of Water

3.Explain the equilibrium shift that occurs when water is added to the original equilibrium reaction.

Cu(H2O)62+(aq) + 4Cl–(aq) D CuCl42–(aq) + 6H2O(l)

blue green

Temperature Changes

4. Write “heat” on either the left or right side of this equation, based upon observations from the addition and removal of heat in steps 3 and 4, respectively, and the corresponding shifts in equilibrium.

____ + Cu(H2O)62+(aq) + 4Cl–(aq) D CuCl42–(aq) + 6H2O(l) + _____

Blue Green

Explanation / Answer

1) shift left

2) when AgNO3 is added to the system Cl- react with AgNO3 forms precipitate so reactant concentration decreases .

according to lechatliers principle if reactant concentration decreases equiibirum will shift towards reactant side

equation: AgNO3 + Cl- --------------> AgCl (s) + NO3-

3) if water is added reaction shifts to the backward direction . if product concentration increases reaction shifts to reactant side

4)

Cu(H2O)62+(aq) + 4Cl–(aq) ------------------> CuCl42–(aq) + 6H2O(l) + __heat___

forward reaction exothermic so it is favours at low temperature.

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