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Use the standard reduction potentials given below to predict if a reaction will occur between Sn(s) and I2 (s), when the two are brought in contact via standard half-cells in a voltaic cell. I₂ (s) +2e → 21¯ (aq) Eº Sn²+ red 0.535 V (aq) + 2e → Sn(s) Ee = -0.140 V red If a reaction will occur, write a balanced net ionic equation for the reaction, assuming that the product ions are in aqueous solution. If no reaction will occur, leave all boxes blank. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) + +
Use the standard reduction potentials given below to predict if a reaction will occur when Pb metal is put into a 1 M aqueous Cd²+ solution. Pb²+ (aq) + 2e¯ → Pb(s) Fre Cd2+ -0.126 V (aq) + 2e¯¯ → Cd(s) E = -0.403 V red If a reaction will occur, write a balanced net ionic equation for the reaction. If no reaction will occur, leave all boxes blank. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) +
Use the standard reduction potentials given below to predict if a reaction will occur when Mg metal is put into a 1 M aqueous H+ solution. red 2H+ (aq) + 2e → H₂(g) Mg2+ (aq) +2e → Mg(s) Fred = 0.000 V -2.370 V If a reaction will occur, write a balanced net ionic equation for the reaction. If no reaction will occur, leave all boxes blank. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) +