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)?

concentration.

a. What weight of Solute is needed (show computations)?

b. What weight of Water is needed (show computations)?

Expert's answer

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 20^{o}C, 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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