Question

A nurse mixes 60 cc of a 70% saline solution with a 20% saline solution to produce a 25% saline solution. How much of the 20% solution should he use

Answer 1

To find out how much of the 20% saline solution should be used, set up an equation using the concept of concentration and solve for x.

Step-by-step explanation:

To find out how much of the 20% saline solution should be used, we can set up an equation using the concept of concentration:

(60 cc)(0.70) + (x)(0.20) = (60 + x)(0.25)

Where x represents the amount of the 20% saline solution to be used.

Simplifying the equation:

42 + 0.20x = 15 + 0.25x

0.05x = 27

x = 540 cc

Therefore, the nurse should use 540 cc of the 20% saline solution.