Answer:
Kf = [[Ag(NH₃)₂]⁺] / [Ag⁺] [NH₃]²
Last step: [Ag(NH₃)]⁺(aq) + NH₃(aq) ⇄ [Ag(NH₃)₂]⁺(aq)
Explanation:
When the Ag⁺ ion is in presence of ammonia molecules in an aqueous solution, the dihydrated complex is formed, following the equilibriums:
Ag⁺(aq) + NH₃(aq) ⇄ [Ag(NH₃)]⁺(aq) K₁
<em>[Ag(NH₃)]⁺(aq) + NH₃(aq) ⇄ [Ag(NH₃)₂]⁺(aq) </em> K₂ → Last step.
And the global reaction:
Ag⁺(aq) + 2 NH₃(aq) ⇄ [Ag(NH₃)₂]⁺(aq)
Being Kf is defined as:
<em>Kf = [[Ag(NH₃)₂]⁺] / [Ag⁺] [NH₃]²</em>
Affects populations,
Occurs when there is genetic variation
Selects organisms with certain traits to survive.
that would be electronegativity increases
Answer is: a suspension.
Suspension is a heterogeneous mixture (solute particles do not dissolve), that contains solid particles (for example nickel sulfide or NiS) sufficiently large for sedimentation.
The internal phase (solid nickel sulfide) is dispersed throughout the external phase (water).
Another example of a suspension is sand in water.