Soda ash and calcium chloride are the products of the chemical reaction.
In the chemical reaction described in the passage, the products are soda ash 
 and calcium chloride
 and calcium chloride
 . The reaction is outlined as follows:
. The reaction is outlined as follows:
 →
 →

The passage states that soda ash
 and calcium chloride
 and calcium chloride 
 are made from sodium chloride
are made from sodium chloride 
 and calcium carbonate
and calcium carbonate 
 in the Solvay process.
in the Solvay process. 
So, soda ash and calcium chloride are the products of the chemical reaction.