The formation of the silver(I) ammine complex ion is a reversible reaction that is allowed to reach equilibrium. For each subsequent change to the system, indicate how the concentration of each species in the chemical equation will change to re-establish equilibrium. An up arrow indicates an increase in concentration, a down arrow indicates a decrease in concentration, and leaving it blank means there is no change in the concentration.

Ag⁺ (aq) + 2NH₃ (aq) ⇆ Ag(NH₃)₂⁺ (aq)

(a) increasing the concentration of Ag⁺

(b) decreasing the concentration of NH₃

(c) increasing the concentration of Ag(NH₃)₂⁺