5. Which of the following are strong electrolytes: BaSO$_4$, AgNO$_3$, HBr, HNO$_3$, and CH$_3$COOH?
6. Which of the following are weak electrolytes: HNO$_3$, HF, HI, NH$_3$(aq), and KOH?
7. For each of the following water-soluble compounds, indicate the ions present in an aqueous solution:
NaI, K$_2$SO$_4$, NaCN, Ba(OH)$_2$, and (NH$_4$)$_2$SO$_4$.
8. Write a balanced chemical equation showing how you could prepare each of the following salts from an
acid-base reaction: KNO$_3$, NaBr, and CaS.