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On Earth, most metals can corrode due to the presence of oxygen in acidic conditions. Assuming the following are the most common reactions for Av
On Earth, most metals can corrode due to the presence of oxygen in acidic conditions. Assuming the following are the most common reactions for Av and Bn: Av3+ (aq) + 3e Av(s) E = -0.43 V Bn4+ (aq) + 4e Bn(s) E = +0.11 V Which metal is more susceptible to corrosion by oxygen? Explain. [2A] Upon corrosion, a layer forms along the surface of a sample of Alphavium. What would this layer be made of? [1A] The layer on top of Alphavium sheds off, similar to how rust sheds off iron. What will happen to the mass of pure Alphavium over time? [1A] (d) Three new elements have just been discovered. These elements are Gammium (Gm), Kappium (ka) and Zetanium (Ze). Preliminary experiments have yielded the following results: Bn (s) + Ze(NO3)3 (aq) no reaction Ze (s) + AV(NO3)2 (aq) no reaction Gm (s) + Av(NO3)3 (aq) no reaction Ka (s) + Gm(NO3)2 (aq) no reaction Bn (s) + Gm(NO3)2 (aq) Gm (s) + Bn(NO3)4 (aq) (i) Arrange the elements Av, Bn, Gm. Ka and Ze in order from strongest reducing agent to weakest reducing agent. [3A] (ii) Will a reaction occur between Gm and Bn(NO3),? Explain. [2A] (iii) Write the reduction half reaction for the reaction that does occur. [1A] (iv)The standard cell potential for the galvanic cell formed between Gammium and Betanium was found to be 0.74V. Determine E for the following reaction. [2T] Gm (s) + 2e- Gm2+ (aq) E =
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