a limestone is put into a hydrochloric acid solution
hydrochloric_acid_solution is aqueous_solution. hydrochloric_acid_solution is not toxic_substance. bluestone is limestone. hydrochloric_acid is acid. hydrochloric_acid_solution is not aqueous_solution. hydrochloric_acid is not acid. hydrocyanic_acid is not acid. hydrocyanic_acid is acid. making_hydrocyanic_acid is not making. making_hydrocyanic_acid is making.