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>
Answer: The average atomic mass of X is 16.53
Explanation:
Mass of isotope X-19 = 2.282
% abundance of isotope X-19 = 12.01% =
Mass of isotope X-21 = 18.48
% abundance of isotope X-21 = (100-12.01)% =
Formula used for average atomic mass of an element :
Therefore, the average atomic mass of X is 16.53
Plants :)
Hope this helps!