Precipitation Reactions

Question

Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NO REACTION. Express your answer as a chemical equation. Identify all of the phases in your answer.

cesium chloride and calcium sulfide

I went through the solubility rules and balanced the resulting equation and this is what I came up with:

2CsCl(aq) + CaS(aq) --> Cs_2S(s) + CaCl_2(aq)

I inputted this into the system and it said I am incorrect. Can someone please check my work and if it is indeed incorrect, then explain HOW to reach the correct solution (I don't need the answer).

Answer 1

Hmmm. Cesium is an alkali metal, isn't its' compounds soluble in water?
http://www.ausetute.com.au/solrules.html

Answer 2

2cs+2S=2CsS

Answer 3

Both products from this reaction are soluble in water creating no reaction.