It reacts with sodium silicate in an aqueous solution to form a precipitate: 1. hydrogen chloride

It reacts with sodium silicate in an aqueous solution to form a precipitate: 1. hydrogen chloride 2. potassium chloride 3. potassium hydroxide 4. barium sulfate 5. sodium nitrate Explanations are welcome, very much!

Answer: 1.
Explanation of the solution to the problem:
1. When sodium silicate interacts with hydrogen chloride, a silicic acid precipitate is formed (this is the only acid that is insoluble in water):
Na2SiO3 + 2HCl => 2NaCl + H2SiO3 (precipitate).
2. When interacting with potassium chloride, sodium chloride and potassium silicate are formed, both of which are soluble in water.
3. Sodium silicate + potassium hydroxide, as a result of the exchange reaction, potassium silicate and sodium hydroxide will be obtained, there will be no sediment.
4. Barium sulfate is a water-insoluble salt, the reaction will not work at all, since only water-soluble salt can enter into an exchange reaction with the salt.
5. When interacting with sodium nitrate, nothing will happen, because two salts cannot react, in which there is one cation.