Answer to Question #138243 in Inorganic Chemistry for ai

Question #138243
Show how to prepare 150 grams of solution which is 7.5% NaCl by weight
concentration.
a. What weight of Solute is needed (show computations)?
b. What weight of Water is needed (show computations)?
1
Expert's answer
2020-10-14T05:47:43-0400

The mass of NaCl needed for the solution is:

Therefore, the mass of water is .

Assuming that the density of water is equal to at 20oC, the volume of water needed is

So, in order to prepare this solution, 11.3 g of NaCl should be weighted and added to 139 mL of pure water.


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