What is 50 mL of HC2H3O2 in grams?
The Correct Answer and Explanation is:
To convert 50 mL of acetic acid (HC₂H₃O₂) into grams, we need to use the density of acetic acid and the formula to find the mass:
Formula:
[
\text{mass (g)} = \text{volume (mL)} \times \text{density (g/mL)}
]
Step 1: Identify the density of acetic acid (HC₂H₃O₂)
The density of acetic acid (glacial acetic acid) is approximately 1.049 g/mL at 25°C. This means that each milliliter of acetic acid has a mass of 1.049 grams.
Step 2: Apply the formula
Now, we will use the formula to convert 50 mL of acetic acid to grams:
[
\text{mass} = 50 \, \text{mL} \times 1.049 \, \text{g/mL}
]
[
\text{mass} = 52.45 \, \text{grams}
]
Final Answer:
50 mL of acetic acid (HC₂H₃O₂) weighs approximately 52.45 grams.
Explanation:
- Density Concept: Density is a physical property that relates the mass of a substance to its volume. For liquids, the density typically varies slightly with temperature, but for standard conditions (room temperature), acetic acid has a density of 1.049 g/mL. This means each milliliter of acetic acid weighs 1.049 grams.
- Unit Conversion: The formula ( \text{mass} = \text{volume} \times \text{density} ) is a simple way to convert from volume (in mL) to mass (in grams) when the density is known. By multiplying the volume (50 mL) by the density (1.049 g/mL), we obtain the mass in grams.
- Real-World Application: In laboratory settings or when using acetic acid as a reagent, it is important to understand the mass of a liquid substance to prepare accurate concentrations, reactions, or dilutions. The relationship between volume and mass helps in determining how much of the liquid is needed for precise chemical reactions or formulations.