Which means that DPSG sodas often appear in Coke or Pepsi vending machines, sometimes even in place of Coke or Pepsi's equivalent brand. For example, Coke's Pibb, their version of Dr Pepper, is harder to find in the New York City area because the local Coke bottler has long held the area rights to Dr Pepper.
Potassium chloride, KCl, is an electrolyte, because in water it dissociates into solvated potassium and chloride ions.
Assuming you mean potassium chloride (KCl), yes it's freely soluble in water. It is a salt meaning it dissociates into a cation K+ and an anion Cl-. Aqueous titration are run routinely with electrodes containing very high concentrations of KCl. Without this compound in your body your heart would stop beating.