Chem

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Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) --> Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of CoCl42- increase or decrease when the following changes occur?
(a) HCl is added.

increases
decreases
.(b) Co(NO3)2 is added.

increases
decreases
.(c) The solution is diluted with water.

decreases
increases
.(d) The temperature is increased.

increases
decreases

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