# Help Zone

### Student Question

Postsecondary • 5mo.

Why do they put .10 H20 in borax?

Chemistry

## Explanations (1)

• Explanation from Alloprof

Explanation from Alloprof

This Explanation was submitted by a member of the Alloprof team.

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Team Alloprof • 5mo.

Hi !

The complete formula is Na$$_2$$B$$_4$$O$$_7$$·10H$$_2$$O. This means that the molecule is hydrated.

Some molécules are sensitive to water to a certain degree. This annotation is meant to express this.

If you have any other question, feel free to ask them !