A stock solution of 1.24 x 10-4 M dye is available in the labo- ratory. What...

Question

Question

A stock solution of 1.24 x 10-4 M dye is available in the labo- ratory. What volume of the stock solution must be transferred

Answer 1

Answer #1

Volume of diluted solution, V₁ = 25.00 mL

Concentration of the diluted solution, C₁ = 2.00 x 10^-5 M

Concentration of the stock solution, C₂ = 1.24 x 10^-4 M

Let us say that the volume of the stock solution that must be transferred = V₂

The moles of solute of the stock solution transferred and the moles of solute of the diluted solution will be the same.

Hence,

C₁V₁ = C₂V₂

or, 2.00 x 10^-5 M x 25.00 mL = 1.24 x 10^-4 M x V₂

or, V₂ = 4.032 mL

Hence, the volume of stock solution that must be transferred = 4.032 mL

The analyst should dispense 4 mL of stock solution to simplify the preparation of the dilution.

Answer 2

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