Question

1.Consider the reaction when aqueous solutions of lead(II) nitrate and zinc iodide are combined. The net ionic equation for this reaction is?

Answer 1

`Pb^(2+) + 2I^(-) rarr underbrace(PbI_2(s)darr)_"bright yellow precipitate"`

Explanation:

How do you know that `PbI_2` is insoluble? You just have to know that all halides are SOLUBLE, EXCEPT for those of `Ag^+`, `Pb^(2+)`, and `Hg_2^(2+)`........ The zinc and the nirate ions are along for the ride, and do not appear in the net ionic equation....