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Dot in chemical formula

Posted: Tue Jun 25, 2019 8:38 pm
by David Zhang 1B
What does a dot in a chemical formula mean such as in problem E.23 when it asks about Na2CO3 (dot) 10H2O?

Re: Dot in chemical formula

Posted: Wed Jun 26, 2019 12:27 am
by Leah farhadi 1F
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).

Re: Dot in chemical formula

Posted: Wed Jun 26, 2019 10:18 am
by Chem_Mod
Any chemical formula that has a dot and H20 is a hydrate, a substance that contains water.