Answer;
Li2S (aq) + SrI2 (aq) ----> LiI2 (aq) + SrS (s)
Step-by-step explanation;
-The precipitate is strontium sulfide. Lithium Iodide will be left in aqueous solution. A precipitation reaction refers to the formation of an insoluble salt (which is the precipitate) when two solutions containing soluble salts are combined.
Second case;
Potassium and sodium phosphate;
No precipitation reaction occurs -because all of the possible products of reaction will remain in aqueous solution.