Ed. 7 E.23D Equation

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Nicole Garrido 2I
Posts: 52
Joined: Fri Sep 28, 2018 12:18 am

Ed. 7 E.23D Equation

Postby Nicole Garrido 2I » Thu Oct 04, 2018 1:31 pm

What does the little multiplication seeming dot mean in the middle of Na2CO3*10H2O. Is it a solvent solute concept?

aisteles1G
Posts: 117
Joined: Fri Sep 28, 2018 12:15 am

Re: Ed. 7 E.23D Equation

Postby aisteles1G » Thu Oct 04, 2018 1:35 pm

The dot is used in formulas where water molecules can only be bound with intermolecular interactions like hydrogen bonds, but they still exist in the structure in a stoichiometric ratio, hence the stoichiometric coefficient before the H20

megan blatt 2B
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

Re: Ed. 7 E.23D Equation

Postby megan blatt 2B » Thu Oct 04, 2018 2:39 pm

Yes, to go off the previous comment, the dot means the compound is a hydrate where the water molecules are bound chemically to the rest of the compound. When doing problems with hydrates, you add the molar mass of the water molecules to the molar mass of the rest of the compound to find the molar mass of the entire hydrate.

ariana_apopei1K
Posts: 89
Joined: Fri Sep 28, 2018 12:27 am
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Re: Ed. 7 E.23D Equation

Postby ariana_apopei1K » Thu Oct 04, 2018 5:10 pm

Essentially, I don't think it changes how you get to the solution btw! Same as the previous parts of the problem.


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