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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: studentcarie on June 25, 2011, 09:44:57 PM

Title: Molarity question, related to below question
Post by: studentcarie on June 25, 2011, 09:44:57 PM

Trying to figure out the molarity of Isobutyraldehyde solution

Received at a 99% solution, molecular weight 72.11, and density at 0.790g/mL (790g/L). Am I right to calculate the molarity to be 10.96M?

Thanks for helping!

Title: Re: Molarity question, related to below question
Post by: Schrödinger on June 26, 2011, 02:05:16 AM

If it is 99% w/w, then the molarity is 10.846 M, I think.

Title: Re: Molarity question, related to below question
Post by: Borek on June 26, 2011, 05:00:33 AM

Quote from: studentcarie on June 25, 2011, 09:44:57 PM

Am I right to calculate the molarity to be 10.96M?

No - you didn't take purity into account.

Title: Re: Molarity question, related to below question
Post by: studentcarie on June 26, 2011, 04:26:45 PM

Thanks so much!  :)

I'm actually now reasoning that, being 99% pure, the difference in molarity either way is negligible for how I'm using it in experiments.

Glad to have found this forum!