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29 March, 09:58

How much 7% saline solution should Kent mix with 60 cubic centimeters (cc) of a 19% saline solution to produce an 11% saline solution?

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  1. 29 March, 10:04
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    x=120cc volume of 7% solution

    Step-by-step explanation:

    Saline solution (7% solution) +

    Saline solution (19% solution) = Saline solution (11% solution)

    Saline solution (7% solution) : (0.07) (x)

    x = unknown volume

    Saline solution (19% solution) : (0.19) (60)

    60 = given volume

    Saline solution (11% solution) = (0.07) (x+60)

    x+60 = Total volume

    solve for x

    (0.07) (x) + (0.19) (60) = (0.11) (x+60)

    0.07x + 11.4 = 0.11x + 6.6

    0.11x - 0.07x = 11.4 - 6.6

    0.04x = 4.8

    x = 4.8/0.04

    x = 120 cc volume of 7% solution
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