Question

Two solutions of salt water contain 0.1% and 0.22% salt respectively. A lab technician wants to make 1 liter of solution which contains 0.13% salt. How much of each solution should she use? Amount of 0.1% solution = milliliters Amount of 0.22% solution = milliliters

Answer 1

she use 750 mL of 0.22% solution and 250 mL of 0.1%

Explanation:

given data

salt water solution 1 = 0.1%

salt water solution 2 = 0.22%

1 liter of solution contains salt = 0.13%

solution

we will consider here quantity in liters of the 0.22% solution is = x

so that the quantity of 0.01% solution will be = 1 - x

so amount of salt in the mix will be as here

0.22 % (x) + 0.1 ( 1-x) = 0.13% (1)

solve it we get

x = 0.25

and

1-x will be = ( 1 - 0.25 ) = 0.75

so she use 750 mL of 0.22% solution and 250 mL of 0.1%