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Borax has only 8 water of crystallization yet why is it called Deca hydrate

Borax has only 8 water of crystallization yet why is it called Deca hydrate

Grade:12th pass

4 Answers

Nishant Vora IIT Patna
askIITians Faculty 2467 Points
5 years ago
Dear student,

Borax has 10 water ofcrystallization only and not 8.
Molecular formula is
Na2B4O7·10H2O
dolly bhatia
200 Points
5 years ago
Borax, also called tincal or sodium tetraborate decahydrate has the formula (Na2B4O7·10H2O). So, borax has ten water of crystallization and not eight. Hence, it is known as tetraborare decahydrate.
Himdyuti Sandilya
26 Points
one year ago
Borax exists in the form of Na2B4O5(OH)4.8H2O. thus it has 8 water of crystallisation. But because in the formula,it has 10 water molecules, it is called decahydrate.
Aayush Prasad
13 Points
9 months ago
It's formula is Na2[B4O5(OH)4].8H2O but formula of water is H2O (the (OH)4 can mean 2H2O and O2) So, it will be added to water of crystallization and become Na2B4O7.10H2O {i am asying this by the results I got on various sites on web: I am a grade 10th student}

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