Answer to Question #164872 in General Chemistry for joyce mae callao

Question #164872

A solution of table sugar in water contains 5.25% by mass sucrose. Calculate

A. The mass of sucrose in 225 g of solution

B. The amount of solution needed to obtain 70.0 g of sucrose.

C. The mass of water contained in 450 g of the solution

D. The mole fraction of sucrose and water in 5.25% by mass sucrose.


1
Expert's answer
2021-02-23T04:29:58-0500

a. 5.25% of 225g = 11.813g


b. 5.25% = 70.0g

100% = x


x = (100% × 70.0) / (5.25%)

= 1333.3g


c. water = 100% - 5.25% = 94.75%

94.75% of 450g = 426.375g


d. mole fraction = number of moles of solute/ number of moles of solute + solvent

= (5.25/342.3) / (5.25/342.3 + 95.75/18)

= 0.0287


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