Answer:
Li2SO4 and SrCl2.
Step-by-step explanation:
Hello,
In this case, reviewing the solubility of the formed salts in each case, we find:
Sodium chloride: very soluble.
Strontium sulfate: very insoluble.
sodium bromide and potassium chloride: very soluble.
Lithium chlorate: very soluble.
In such a way since the formed strontium sulfate, due to the reaction between lithium sulfate and strontium chloride, is very insoluble in water, such reaction will form the required precipitate.
Best regards.