21. Solving a chemistry problem

9. Na3[BiCl6] KI →… Na3[BiCl6] KSCN→…
Kneading resistance([BiCl6]3-)=3.8×10-7; Knock resistance([Bi(SCN)6]3-)=5.89×10-5;
Knock resistance([BiI6]3-)=7.94×10-20;
a) Write the reaction equations and state in which direction and why they will proceed.
b) Name all complex compounds.
c) Write the reactions of dissociation of complex compounds.
d) Write expressions for the instability constants of complex ions.