Sodium sulfate (Na2SO4) is a strong electrolyte. What species are present in Na2SO4(aq)? 4.9 Identify each of the following substances as a strong electrolyte, weak electrolyte, or nonelectrolyte: (a) H2O, (b) KCI, (C) HNO3, (d) CH2COOH, (e) C12H22011-