Dot in chemical formula

Moderators: Chem_Mod, Chem_Admin

David Zhang 1B
Posts: 48
Joined: Mon Jun 17, 2019 7:23 am

Dot in chemical formula

Postby David Zhang 1B » Tue Jun 25, 2019 8:38 pm

What does a dot in a chemical formula mean such as in problem E.23 when it asks about Na2CO3 (dot) 10H2O?

Leah farhadi 1F
Posts: 36
Joined: Mon Jun 17, 2019 7:23 am

Re: Dot in chemical formula

Postby Leah farhadi 1F » Wed Jun 26, 2019 12:27 am

I think that it means that there is 10 moles of H2O molecules in the compound. I think it is written this way as to not get confused with putting it in front of the chemical equation of the compound, as it makes it seem like there are 10 moles of the compound. Also, it helps to not get it confused with putting it as a subscript, as it can only be related to either H or O and not together as a compound (H2O).

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: Dot in chemical formula

Postby Chem_Mod » Wed Jun 26, 2019 10:18 am

Any chemical formula that has a dot and H20 is a hydrate, a substance that contains water.


Return to “Accuracy, Precision, Mole, Other Definitions”

Who is online

Users browsing this forum: No registered users and 1 guest