What volume of a 3.00 M KI stock solution would you use to make 0.270 L of a 1.25 M KI solution?
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To find the volume of a 3.00 M KI stock solution needed to make a 0.270 L of a 1.25 M KI solution, you can use the formula:
C₁V₁ = C₂V₂
Where:
C₁ = concentration of the stock solution
V₁ = volume of the stock solution
C₂ = concentration of the desired solution
V₂ = volume of the desired solution
In this case, the values are:
C₁ = 3.00 M (concentration of the stock solution)
C₂ = 1.25 M (concentration of the desired solution)
V₂ = 0.270 L (volume of the desired solution)
Let's solve for V₁:
V₁ = (C₂V₂) / C₁
Substituting the given values:
V₁ = (1.25 M * 0.270 L) / 3.00 M
V₁ ≈ 0.1125 L
Therefore, you would need to use approximately 0.1125 liters (or 112.5 mL) of the 3.00 M KI stock solution to make 0.270 L of a 1.25 M KI solution.