**QUIZ 5 – Chapter 4 Part 1** **Total time: 10 minutes**
**Part I. (8 points) Multiple choice questions** **Question 1:** A strong electrolyte is one that \_\_\_\_\_\_\_\_\_\_\_\_ completely into ions in a solution. A. reacts B. decomposes C. disappears D. dissociates **Question 2:** A weak electrolyte exists predominantly as \_\_\_\_\_\_\_\_\_\_\_\_ in solution. A. atoms B. ions C. molecules D. isotopes **Question 3:** What are the spectator ions in the reaction between $\text{KOH (aq)}$ and $\text{HNO}_3 \text{ (aq)}$? A. $\text{K}^+$ and $\text{H}^+$ B. $\text{H}^+$ and $\text{OH}^-$ C. $\text{K}^+$ and $\text{NO}_3^-$ D. $\text{H}^+$ and $\text{NO}_3^-$ **Question 4:** Hydrofluoric acid, HF, is a weak acid, meaning, it does not dissociate completely in water. What is the net ionic equation for the reaction between aqueous solutions of HF and KOH? A. $\text{HF (aq)} + \text{KOH (aq)} \rightarrow \text{H}_2\text{O (l)} + \text{K}^+ \text{(aq)} + \text{F}^- \text{(aq)}$ B. $\text{HF (aq)} + \text{OH}^- \text{(aq)} \rightarrow \text{H}_2\text{O (l)} + \text{F}^- \text{(aq)}$ C. $\text{HF (aq)} + \text{K}^+ \text{(aq)} + \text{OH}^- \text{(aq)} \rightarrow \text{H}_2\text{O (l)} + \text{KF (aq)}$ D. $\text{H}^+ \text{(aq)} + \text{OH}^- \text{(aq)} \rightarrow \text{H}_2\text{O (l)}$ **Part II. (2 points) Long answer question** **Question 5:** Which of the following are strong electrolytes: $NaCl$ (table salt), $C_{12}H_{22}O_{11}$ (table sugar), $HI$, $NH_3$? Give an explanation for your answer.