April 17, 2024, 09:28:19 PM
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Topic: calculating molarity of Na+ salt solution -- include Na+ in molecular weight?  (Read 4258 times)

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Offline Sodium-Potassium Pump

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Hi, I need to make a solution of saccharin in the lab and am using a saccharin sodium salt which is water soluble.  I can't remember if I'm supposed to include the Na+ atomic weight for the molecular weight of the compound when calculating my molarity or not.  It's either 205.16 or 182.18.  Thanks for the *delete me*

Offline JGK

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For every 1.126g of saccharin (sodium salt) you weight it will contain 1 g saccharin.
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Offline Sodium-Potassium Pump

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For every 1.126g of saccharin (sodium salt) you weight it will contain 1 g saccharin.

So you're saying don't include Na in my molecular weight when calculating the molarity of my solution?

Offline JGK

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Having the sodium salt just means you have wiegh more to get the required quantity of saccharin, the conversion factorbetween the two weieghts is calculated from the molecular weight ratio = (Sodium saccharin/saccharin)
Experience is something you don't get until just after you need it.

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