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28. How many grams of active ingredient are needed to prepare 250 mL of a 10% solution? 

          28. How many grams of active ingredient are needed to prepare 250 mL of a 10% solution?

Added by Maurice S.

Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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28. How many grams of active ingredient are needed to prepare 250 mL of a 10% solution?
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Transcript

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00:01 Hi, in this question we are given with a solution concentration that is equal to 100 is to 1000.
00:07 We are asked to calculate the volume in terms of milliliters of the solution that would need to obtain 40 grams of active ingredient.
00:17 Here, 100 represents the mass in terms of gram of active ingredient that is present in 1000 ml of solution.
00:28 Therefore, here we can write the mass of active ingredient and here we can write volume.
00:42 We can say 100 grams of active ingredient is present in 1000 ml of solution...
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