For a blue solution Cu + 4Br --> <-- CuBr4 a professor added a few drops of KBr(aq) and the solution became purple. (Cu

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For a blue solution Cu + 4Br --> <-- CuBr4
a professor added a few drops of KBr(aq) and the solution became
purple. (Cu is blue, CuBr4 is purple)
i) Before adding drops of KBr(aq), how does the concentration of
Cu compare to CUBr4?
ii) Draw a detailed concentration vs. time graph for all the
ions (Cu, 4Br, CuBr4) that shows 1) the system at equilibrium
before adding KBr(aq), 2)the instantaneous addition of KBr(aq) 3)
the change of the reaction/system from the addition of KBr(aq).