Grade 12th passInorganic Chemistry

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

Krishna chourasia

9 Years agoGrade 12th pass

4 Answers

Nishant Vora

9 Years ago

Dear student,

Borax has 10 water ofcrystallization only and not 8.
Molecular formula is
Na2B4O7·10H2O

jyoti bhatia

9 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

5 Years 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

4 Years 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}