Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?

We know that acidic strength of an acid also depend upon stability of its conjugate base. So silianol is more acidic than methanol (H₃C-OH) because conjugate base silianol (H₃Si-OH) stablised by dispersal of negative charge in H₃Si-O- ion by 2pπ—3dπ back bonding

Hence methanol is less acidic than silianol.

For more detail on Back bonding click here

Related Questions: 

(1) Although anhydrous aluminium chloride is covalent but its aqueous solution is ionic in nature. Why?

(2) Why Ga has small size than Al exceptionally

(3) Why aqueous solution of borax reacts with two moles of acids ?

(4) What is structure of solid Ortho Boric acid ?

(5) What is the structure of trimetaboric acid and trimetaborate ion?  

(6) Why Borazine is more reactive than benzene towards Electrophic Aromatic substitution reactions ?

(7) Why Borazine (B3N3H6) is also known as inorganic benzene ?.

(8) Why B-F bond length in BF3 is shorter (130 pm) than B-F bond Iength in BF4- (143 pm)?. Explain.

(9) Why B-F do not exist as dimer?. Explain.

(10) Although anhydrous aluminium chloride is covalent but its aqueous solution is ionic in nature. Why?

(11) Why Boric acid become strong acid in the presence of cis 1,2-diol or 1,3-diol ?

Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.

In N(SiH₃)₃, N attains sp2 hydridisation and the lone pair of N is involved in d_pi-p_pi  back bonding by getting itself delocalized on to empty 3d – orbitals of silicon.

But in N(CH₃)₃, N is sp3 hybridised in which three of the hybrid orbitals are used in forming s  - bonds with NH₃ groups, while the lone pair is present in the fourth hybrid orbital. Thus the molecule is pyramidal.

For More deatils click here Back Bond theory:

What is the molecular formula of Borax ?

(A) Na₂[B₄O₃(OH)₄].6H₂O

(B) Na₂[B₄O₅(OH)₄].6H₂O

(C) Na₂[B₄O₅(OH)₄].8H₂O

(D )Na₂[B₄O₆(OH)₂].8H₂O

The structure of Borax is Na₂[B₄O₅(OH)₄].8H₂O.

Hence option (C) is the correct answer for details click on link given below

Tincol or Suhaga: