The solution remaining from Part A, which contains 0.0100 M Ni2 and Fe2 ions, is still saturated with H2S gas, producing a concentration of 0.100 M. A buffer is added to this solution to produce a pH of 1.51 . Which of the following describes correctly the effect of the addition of the buffer?a) Only NiS precipitates.
b) Only FeS precipitates.
c) Both NiS and FeS precipitate.
d) Neither NiS nor FeS precipitate.