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Enter the chemical formula of a binary molecular compound of hydrogen and a Group 4A element that can reasonably be expected to be more acidic in aqueous solution than , e.g. have a larger .

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Answer: GeH4 (Germanium(IV) Hydride)

Explanation:

A Binary molecular compound Hydrogen and a Group 4A element which is more more acidic than SiH4 in aqueous solution is GeH4.

The pKa of GeH4;

= 25

Whilst that of SiH4

= 35

The lesser the pKa the higher the Ka which means more acidic.

The binary compound that has been more acidic than [tex]\rm SiH_4[/tex] has been [tex]\rm GeH_4[/tex].

The group 4A of the periodic table has been the comprised of carbon and metalloid silicon, germanium, tin, and lead.

The elements have been comprising 4 valence electrons, and require 4 electrons to complete the octet.

Acidic hydride of Group 4A

In the periodic table, on moving across the period the acidic character of hydrides increases, while on moving down the group the acidic character increases.

The element below silicon in the periodic table has been Ge. Thus, the hydride of germanium has been more acidic than silicon tetra hydride.

Thus, the binary compound that has been more acidic than [tex]\rm SiH_4[/tex] has been [tex]\rm GeH_4[/tex].

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