Assuming the general trend reactivity of metals across a row, predict whether or

Question

Assuming the general trend reactivity of metals across a row, predict whether or not the following reactions will take place. Ti + CuCl_2 Al + MgCl_2 For the following reactions, determine the most and least reactive metals. Cu + AuCl_3 rightarrow CuCl_2 + Au Al + MgCl_2 rightarrow NO REACTION Cu + FeCl_3 rightarrow NO REACTION Au + FeCl_3 rightarrow NO REACTION Mg + CuCl_2 rightarrow MgCl_2 + Cu K + AlCl_3 rightarrow KCl + Al Mg + KCl rightarrow NO REACTION Al + FeCl_3 rightarrow AlCl_3 + Fe Rank the metals Mg, Au, Al, Cu, Fe and K from most reactive to least reactive from data above.

Explanation / Answer

Answer to Q1)

Both aluminium and titanium react with air to form their respective oxides. This brings inertness to these metals and hence both these metals will not react with a metal halide. You will need strong acids to break these oxide layers.

Answer to Q2)

Alkali metals are the most reactive metals as they have only one electron in their outermost shell to lose. This can be achieved easily and hence potassium metal (from our series) will be the most reactive metal.

The electronic configuration of gold is [Xe] 4f14 5d10 6s1. The electron from 6s orbital is shielded by the 5d10 orbitals and hence is very difficult to lose. This makes gold very inert and the least reactive metal from our series.

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