In Flint, Michigan, toxic lead metal was found in the water and it needs to be filtered out in order for the city to have clean and safe drinking water. A company is proposing a solution where they mix negative ions into the water to bond with the Pb+2 ions and form an insoluble solid that can be filtered out.

Question

In Flint, Michigan, toxic lead metal was found in the water and it needs to be filtered out in order for the city to have clean and safe drinking water. A company is proposing a solution where they mix negative ions into the water to bond with the Pb+2 ions and form an insoluble solid that can be filtered out.
Which of the following compounds contains ions that could be used in order to form a precipitate with lead?
A.NaNO3
B.K2504
C.HC2H302
D.NaCIOz

GPT 3.5 · Answer

B. K2SO4 Potassium sulfate (K2SO4) contains potassium ions (K+) which could be used to form a precipitate with the lead ions (Pb+2).