Determine [Zn2+] [CN-] [HCN] in a saturated solution of Zn(CN)2 with a fixed pH of 2.390. The Ksp for Zn(CN)2 is 3.0x10^-16. The Ka for HCN is 6.2x10^-10.
Equation: Zn(CN)2(s)-> Zn2+(aq) + 2CN(aq)
a) Write pertinent reactions
b) Write charge balance equations
c)Write mass balance equations
d)Write the equilibrium constant expression for each reaction
e)Count the equations and unknowns
f)Solve for unknowns