Chemistry 9701 · AS & A Level · Electrochemistry

Electrochemistry — practice question

If chlorine is warmed with aqueous sodium hydroxide, the overall reaction is as follows. $3\text{Cl}_2(aq) + 6\text{NaOH}(aq) \rightarrow 5\text{NaCl}(aq) + \text{NaClO}_3(aq) + 3\text{H}_2\text{O}(l)$ State the oxidation numbers of chlorine in each of the species below?

  • A$\text{Cl}_2: 0,\ \text{NaCl}: +1,\ \text{NaClO}_3: -5$
  • B$\text{Cl}_2: +2,\ \text{NaCl}: -1,\ \text{NaClO}_3: +3$
  • C$\text{Cl}_2: 0,\ \text{NaCl}: -1,\ \text{NaClO}_3: +5$
  • D$\text{Cl}_2: -2,\ \text{NaCl}: +1,\ \text{NaClO}_3: -3$

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