Borax is actually made of two tetrahedra and two triangular units joined together and should be written as: Na 2 [ B 4 O 5 ( OH ) 4 ] .8 H 2 O Consider the following statements about borax:

Question

Borax is actually made of two tetrahedra and two triangular units joined together and should be written as: $Na_{2} [B_{4} O_{5} (OH)_{4}] .8 H_{2} O$

Consider the following statements about borax:

a. Each boron atom has four B-O bonds

b. Each boron atom has three B-O bonds

c. Two boron atoms have four B-O bonds while other two have three B-O bonds

d. Each boron atom has one –OH groups

Select incorrect statement(s):

TestHub · Accepted Answer

The borate anion in borax, [ B 4 ​ O 5 ​ ( OH ) 4 ​ ] 2 − , has two boron atoms that are sp³ hybridized (tetrahedral, with four B-O bonds) and two boron atoms that are sp² hybridized (trigonal planar, with three B-O bonds). Each of the four boron atoms is bonded to one -OH group. Therefore, statements (a) and (b) are incorrect. The final answer is A

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