Yes, cobalt chloride (CoCl2) and lead nitrate (Pb(NO3)2) will react in an aqueous solution. This reaction is a double displacement reaction and results in the formation of a precipitate.

Here's the balanced chemical equation:

CoCl2 (aq) + Pb(NO3)2 (aq) → PbCl2 (s) + Co(NO3)2 (aq)

Here's a breakdown:

* CoCl2 (aq): Cobalt chloride is soluble in water, forming cobalt(II) ions (Co²⁺) and chloride ions (Cl⁻).

* Pb(NO3)2 (aq): Lead nitrate is also soluble in water, forming lead(II) ions (Pb²⁺) and nitrate ions (NO₃⁻).

* PbCl2 (s): Lead chloride is insoluble in water, and it precipitates out of the solution as a white solid.

* Co(NO3)2 (aq): Cobalt nitrate remains dissolved in the solution.

The reaction occurs because the lead(II) ions (Pb²⁺) and chloride ions (Cl⁻) have a strong attraction for each other, forming a stable, insoluble compound (PbCl2).