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  • A student prepared a solution by adding 150 g  of 30 % and 250 g of 45% solution by mass. Find out the % composition of the solution in terns of mass.<div class='q

A student prepared a solution by adding 150 g  of 30 % and 250 g of 45% solution by mass. Find out the % composition of the solution in terns of mass.

Option: 1

39.37%


Option: 2

49.37%


Option: 3

69.37%


Option: 4

89.37%


Answers (1)

30 % solution by mass means 30 g of solute m 100 g solution.

45 % solution by mass means 45 g of solute in 100 g solution 

Mass of solute in 150 g solution 

=\frac{30}{100}\times 150

=45 \; \text{g}

Mass of solute in 250 g solution 

=\frac{45}{100}\times 250

=112.5 \; \text{g}

Total mass of solute 

=45+112.5

 =\mathrm{157.5 \; g}

Mass % in the mixture   

=\frac{157.5}{400}\times 100

=\mathrm{39.37 %}

Posted by

Sumit Saini

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