How would you prepare a 500 ml lab stock of:

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To prepare a 500 ml stock solution of 20% (w/v) SDS, you need to understand that "w/v" refers to grams of solute per 100 ml of solution. For a 20% solution, this means you require 20 grams of SDS for every 100 ml of solution. Therefore, for 500 ml, you would need 100 grams of SDS (20 g x 5). The calculation of 0.1 g SDS for 500 ml is incorrect; the correct amount is 100 grams. Understanding the definition of w/v is crucial for accurate preparation.
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Homework Statement



How would you prepare a 500 ml lab stock of 20% (w/v) SDS

That is all that is stated in the problem.

Homework Equations



I'm assuming for w/v the volume would be 0.5L but the weight I'm not sure.


The Attempt at a Solution



0.5L x .20 = .1g SDS / .5 L .. is that correct? doesn't make sense to me.

Please help!
 
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What does 20% SDS (w/v) mean? Once you know that, the answer will present itself...
 
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