Redox Equilibrium

Question 1:Write the cell notation for the following voltaic cells:$$ \begin{aligned} & \mathrm{Sn}^{2+} / \mathrm{Sn} \text { and } \mathrm{Mg}^{2+} / \mathrm{Mg} . \\ & \mathrm{Cl}_2 / \mathrm{Cl}^{-} \text {and } \mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+} . \end{aligned} $$ Answer:(a)$$ \operatorname{Mg}(\mathrm{s})\left|\mathrm{Mg}^{2+}(\mathrm{aq})\right|\left|\mathrm{Sn}^{2+}(\mathrm{aq})\right| \operatorname{Sn}(\mathrm{s}) $$(b)$$ \operatorname{Pt}(\mathrm{s})\left|\mathrm{Cl}^{-}(\mathrm{aq}), \mathrm{Cl}_2(\mathrm{aq})\right|\left|\mathrm{MnO}_4^{-}(\mathrm{aq}), \mathrm{Mn}^{2+}(\mathrm{aq})\right| \operatorname{Pt}(\mathrm{s}) $$ Question 2:Calculate the voltage for the following cells:$$ \text … Read more

Activity 1G:Carry out this activity collaboratively in groups.1. Figure 1.19 shows an apparatus set-up for a voltaic cell.(a) Based on Figure 1.19, and referring to the standard electrode potential of a half-cell:(i) identify the negative and positive terminals.(ii) write the cell notation for the voltaic cell.(iii) write the half equations for oxidation reaction, reduction reaction … Read more

Experiment 1A (Determining the Voltage of a Voltaic Cell):Aim: To determine the voltage of a voltaic cell by using different pairs of metals.Problem statement: How can different pairs of metals dipped into electrolytes affect the voltage of the voltaic cell?Hypothesis: The greater the difference of the value of standard electrode potential of pairs of metals, … Read more

Question 1:Table 1.7 shows the standard electrode potential values of half-cells for some metals.(a) Arrange the atoms or ions in Table 1.7 in an ascending order of the strength of oxidising agents and reducing agents.(b) Based on your answer in (a), explain if the reaction will occur for the following reactants:(i) Mg(s) + Cu2+(aq). (ii) … Read more

Activity 1F:Carry out a Think-Pair-Share activity.1. Refer to page 24 for the standard electrode potential cell value, E0.2. Discuss with your friends whether the following reactions occur:(a) Cr2O72−(aq) + 14H+(aq) + 6Cl−(aq) → 2Cr3+(aq) + 3Cl2(g) + 7H2O(l)(b) H2O2(aq) + 2Br−(aq) + 2H+(aq) → Br2(aq) + 2H2O(l)3. Present the results of your discussion in class. … Read more

Self Assess 1.1:1. What is the meaning of a redox reaction?2. Table 1.5 shows the equations for several redox reactions.For each of the above redox reaction:(a) write the half equations for oxidation and reduction.(b) identify the oxidised substance, reduced substance, oxidising agent and reducing agent.Explain your answer in terms of the transfer of electrons. Answer:1. … Read more

Laboratory Activity 1D (Displacement of a Halogen from Its Halide Solution):Aim: To investigate the redox reaction in the displacement of a halogen from its halide solution.Materials: Chlorine water, Cl2, bromine water, Br2, iodine, I2 solution, 0.5 mol dm−3 of potassium chloride, KCl solution, 0.5 mol dm−3 of potassium bromide, KBr solution, 0.5 mol dm−3 of … Read more

Laboratory Activity 1C ( Displacement of Metal from Its Salt Solution):Aim : To investigate a redox reaction in the displacement of metal from its salt solution.Materials : Magnesium ribbon, Mg, lead plate, Pb, copper plate, Cu, 0.5 mol dm−3 of lead(II)nitrate, Pb(NO3)2, solution, 0.5 mol dm−3 of magnesium nitrate, Mg(NO3)2, solution and 0.5 mol dm−3 … Read more

Laboratory Activity 1B (Conversion of Iron(II) Ion, Fe2+ to Iron(III) Ion, Fe3+ and Vice Versa):Aim: To study the conversion of iron(II) ion, Fe2+ to iron(III) ion, Fe3+ and vice versa.Materials: 0.5 mol dm−3 of iron(II) sulphate, FeSO4 solution (freshly prepared), 0.5 mol dm−3 of iron(III) chloride, FeCl3 solution, bromine water, Br2 , zinc powder, Zn … Read more

Carry out this activity in pairs.Record the findings in your notebook. Question 1:State the name of the following compounds according to the IUPAC nomenclature.(a) Cu2O (b) CuO (c) Hg2Cl2(d) HgCl2(e) K2CrO4 Answer:(a) Copper(I) oxide(b) Copper(II) oxide(c) Mercury(I) chloride(d) Mercury(II) chloride(e) Potassium chromate(VI) Question 2:Write the formula for the following compounds.(a) Vanadium(V) oxide (b) Sodium oxide … Read more