In an experiment, when 25 mL of 5.5 x 10^-3 M NaOH is mixed with 30 mL of 7.5 x 10^-3 M Fe(Br)2, a hydroxide compound is formed (Ksp = 1.8 x 10^15). Which of the following describes the resulting solution?
a. The product is unsaturated
b. The mixture product is saturated
c. The resulting solution is supersaturated
d. The solution is over supersaturated
Please help, I am not sure how to do this.
I think you made a typo on the Ksp. I believe that should be 1.8E-15.
When (*Fe^2+)(OH^-)^2 is greater than Ksp (and in this case it is), a Fe(OH)2 ppt forms until the solution is saturated. The excess ppts. I'm not sure of the difference between answers a and b; however, I know it isn't unsaturated nor supersaturated and I know the solution is saturated so the answer must be b.