What is meant by 0.2mol (12g) of glacial acetic acid how can we make ?
It means weigh out 12g glacial acaetic acetic acid.
The density of glacial acetic acid is about 1.05g/mL and the stuff is about 99.5% pure so if you pipet 11.4 mL that will weigh 12g. However, I don't think you will find a pipet with the volume 11.4 mL. If the 12 g doesn't need to be that accurate you can measure it with a graduated cylinder.
To understand what is meant by 0.2 mol (12g) of glacial acetic acid, we need to break it down into two parts: mole quantity and mass.
1. Mole quantity: A "mole" is a unit of measurement used in chemistry to represent a specific quantity of a substance. In this case, 0.2 mol of glacial acetic acid refers to the number of moles of the substance.
2. Mass: The 12g in parentheses indicates the mass of the glacial acetic acid.
Now, let's move on to how we can make 0.2 mol (12g) of glacial acetic acid:
1. Determine the molar mass of glacial acetic acid: The molar mass is the mass of one mole of a substance. For glacial acetic acid (CH3COOH), the molar mass is approximately 60.05 g/mol.
2. Use the relationship between moles and mass: To calculate the mass of a substance given the number of moles, or vice versa, use the equation:
Mass (g) = Moles x Molar mass.
Here, we know that the mass is 12g and the moles are 0.2 mol. We can rearrange the formula to solve for the molar mass:
Molar mass = Mass (g) / Moles.
Plugging in the values:
Molar mass = 12g / 0.2 mol = 60g/mol.
We can see that the calculated molar mass of 60g/mol matches the molar mass of glacial acetic acid.
3. To make 0.2 mol (12g) of glacial acetic acid, you would need to measure out 12 grams of glacial acetic acid using a scale or balance.
To understand what is meant by "0.2 mol (12g) of glacial acetic acid," we need to break it down into two parts: the molar quantity and the mass quantity.
Molar Quantity:
"Mol" or "mol" stands for mole, which is a unit used to measure the amount of a substance. One mole of any substance contains 6.022 × 10²³ particles, which is known as Avogadro's number. Therefore, 0.2 mol of glacial acetic acid implies that we have 0.2 × 6.022 × 10²³ molecules of glacial acetic acid.
Mass Quantity:
The formula weight or molar mass of glacial acetic acid (CH₃COOH) is approximately 60.05 grams per mole. Multiplying this molar mass by 0.2 mol gives us 0.2 × 60.05 = 12.01 grams, which can be rounded to 12 grams.
Now, to make glacial acetic acid, here is a commonly used laboratory procedure:
1. Start by wearing appropriate safety equipment, such as gloves, goggles, and a lab coat, to ensure safety during the process.
2. Take a clean, dry glass container or beaker.
3. Measure out 12 grams of glacial acetic acid using an analytical balance or a digital scale. Ensure that the equipment is calibrated and accurate.
4. Carefully pour the measured glacial acetic acid into the glass container. Handle it with care, as it is a corrosive substance.
5. If the glacial acetic acid needs to be diluted or used in a specific solution, measure out the required amount of solvent (such as water) and add it gradually to the glacial acetic acid, while stirring gently.
6. Stir the mixture until the glacial acetic acid dissolves completely. Ensure that the container is clean and no residue is left on the sides.
7. After the glacial acetic acid is prepared, it should be stored in a tightly sealed, properly labeled container. It is important to follow appropriate storage guidelines and store it in a cool, well-ventilated area, away from heat, flames, and incompatible substances.
Remember, working with glacial acetic acid requires proper laboratory techniques and precautions. If you are not familiar with working in a laboratory setting, it is advisable to seek guidance from a trained professional or consult a relevant laboratory manual or procedure.