Questions: How many mL of propyl alcohol are required to make a 2.27% (v/v) aqueous solution in a 100 mL volumetric flask?

How many mL of propyl alcohol are required to make a 2.27% (v/v) aqueous solution in a 100 mL volumetric flask?
Transcript text: How many mL of propyl alcohol are required to make a $\mathbf{2 . 2 7} \%(\mathrm{v} / \mathrm{v})$ aqueous solution in a $\mathbf{1 0 0} . \mathrm{mL}$ volumetric flask?
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Solution

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Solution Steps

Step 1: Understand the Problem

We need to determine the volume of propyl alcohol required to make a 2.27% (v/v) aqueous solution in a 100 mL volumetric flask.

Step 2: Define the Percentage (v/v)

The percentage (v/v) means volume of solute (propyl alcohol) per 100 mL of solution. Therefore, 2.27% (v/v) means 2.27 mL of propyl alcohol in 100 mL of solution.

Step 3: Calculate the Volume of Propyl Alcohol

Since the total volume of the solution is 100 mL, we can directly use the percentage to find the volume of propyl alcohol: \[ \text{Volume of propyl alcohol} = \frac{2.27}{100} \times 100 \, \text{mL} = 2.27 \, \text{mL} \]

Final Answer

\[ \boxed{2.27 \, \text{mL}} \]

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