Which pairs of reactants will result in a chemical reaction? Refer to the activity series as needed. Pb ( s ) + MgCl 2 ( aq ) Pb
Answer:
Al (s) + AgClO3 (aq) will undergo a chemical reaction.
Al(s) + 3AgClO₃(aq) -----> Al(ClO₃)₃(aq) + 3Ag(s)
Cd(s) + CuNO3(aq) will also engage in a chemical reaction.
Cd(s) + 2CuNO₃ -----> Cd(NO₃)₂ + 2Cu
Explanation:
In chemical reactions, metal elements positioned lower in the activity series typically cannot replace those positioned higher in the series.
Metals located lower on the activity series are less likely to oxidize.
The activity series is referenced in this solution. (Note: While Cadmium is not directly illustrated, it falls between Iron (Fe) and Cobalt (Co) within the series.)
- Lead is significantly lower than Magnesium in the activity series, so it cannot displace Mg2+ ions in a solution.
- Aluminium ranks higher than Silver in the series; thus, it can easily oxidize and replace Silver ions from its solution.
- Cadmium is capable of displacing Copper in solution since it ranks higher than Copper in the activity series.
- Platinum is unable to displace Cobalt from a solution, as it ranks lower than Cobalt in the activity series.
