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A student diluted 10.0 milliliters (mL) of a 9.00 Molar (M) HCl solution in order to prepare a 0.50 M solution for his organic extraction analysis.What quantity of water, in mL, was added to make the 0.50M HCl solution?

A: 150
B: 160
C: 170
D: 180

Respuesta :

Eduard22sly

The quantity of water in mL that was added to make the solution is 170 mL (option C)

How to determine the volume of the diluted solution

  • Volume of stock solution (V₁) = 10 mL
  • Molarity of stock solution (M₁) = 9 M
  • Molarity of diluted solution (M₂) = 0.5 M
  • Volume of diluted solution (V₂) =?

M₁V₁ = M₂V₂

9 × 10 = 0.5 × V₂

90 = 0.5 × V₂

Divide both side by 0.5

V₂ = 90 / 0.5

V₂ = 180 mL

How to determine the volume of the water

  • Volume of stock solution (V₁) = 10 mL
  • Volume of diluted solution (V₂) = 180 mL
  • Volume of water added =?

Volume of water added = V₂ – V₁

Volume of water added = 180 – 10

Volume of water added = 170 mL

Learn more about dilution:

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