Question

Calculate the equilibrium concentration of Cu²+ in a solution initially with 0.050 M Cu²+ and 1.00 M NH₃.

a) 0.02 M
b) 0.04 M
c) 0.06 M
d) 0.08 M

Answer 1

To calculate the equilibrium concentration of Cu²+ in a solution initially with 0.050 M Cu²+ and 1.00 M NH₃, we can use the formation constant equation. By assuming the formation of [Cu(NH₃)₄]²+ is complete and applying stoichiometry, we can calculate the equilibrium concentration of Cu²+ (aq).

Step-by-step explanation:

The equilibrium concentration of Cu²+ in a solution initially with 0.050 M Cu²+ and 1.00 M NH₃ can be calculated using the formation constant equation.

In this case, we assume that the formation of [Cu(NH₃)₄]²+ is complete and allow some of it to dissociate into Cu²+ and NH₃ until equilibrium is reached. By substituting the final concentrations into the expression for the formation constant, we can calculate the equilibrium concentration of Cu²+ (aq).