Final answer:
In a solution with 1 mol L-1 H+, gold (Au) and silver (Ag) would not dissolve because they are located below hydrogen in the electrochemical series, indicating they are less reactive with acids.
Step-by-step explanation:
The question is asking which metals will not dissolve in a solution containing 1 mol L-1 H+. The reactivity of a metal with acids is determined by its position in the electrochemical series, compared to hydrogen.
In this series, metals that are positioned below hydrogen have a greater tendency to undergo oxidation and dissolve in acid, emitting hydrogen gas in the process.
Certain metals, such as gold (Au) and silver (Ag), are known for their low reactivity with acids. This is because they are located below hydrogen in the electrochemical series and therefore do not easily give up electrons to form ions in the presence of H+.
On the other hand, metals like magnesium (Mg) and zinc (Zn) are more reactive and positioned above hydrogen, so they will likely dissolve in acidic solutions.
Based on this principle, the metals from the given list that will not dissolve in a solution containing 1 mol L-1 H+ are gold (Au) and silver (Ag).