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A prescription is written for 500 mL of a 7% NaCl solution. The technician has a 50% NaCl solution. What volume of
50% NaCl is required for the 7% solution?
mL

Respuesta :

maacastrobr

Answer:

70 mL

Explanation:

To solve this problem we can use the C₁V₁=C₂V₂ equation, where the subscript 1 refers to the concentrated solution while subscript 2 refers to the diluted one, as follows:

  • C₁ = 50
  • V₁ = ?
  • C₂ = 7
  • V₂ = 500 mL

We input the data:

  • 50 * x = 7 * 500 mL

And solve for x:

  • x = 70 mL

Thus the answer is 70 mL.

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