- Glacial acetic acid is a clear colorless liquid. A 99.7% (w/w) concentrated glacial acetic acid can be obtained from different suppliers.
- A 99.7% (w/w) glacial acetic acid means that 100 g of glacial acetic acid contains 99.7 g of acetic acid.
- The density of glacial acetic acid is 1.049 g/ml at 25°C which means that the weight of the 1 ml of glacial acetic acid is 1.049 grams at 25°C.
- Molarity refers to the number of moles of the solute present in 1 liter of solution.
- In simple words, 1 mole is equal to the atomic weight of the substance. For example, 1 mole of acetic acid is equivalent to 60.05 g of acetic acid (molecular weight = 60.05).
Calculation procedure:
Known values | |
Density of glacial acetic acid | 1.049 g/ml |
Molar mass of acetic acid (CH3COOH) | 60.05 g/mole |
Concentration of glacial acetic acid | 99.7% (% by mass, wt/wt) |
Step 1: Calculate the volume of 100 grams of glacial acetic acid solution.
Formula:
or
Note: 99.7% (w/w) Glacial acetic acid means 100 g of glacial acetic acid contains 99.7 g of acetic acid.
The volume of 100 g of glacial acetic acid is 95.329 ml. That means 99.7 grams of acetic acid is present in 95.329 ml of glacial acetic acid.
Step 2: Calculate how many grams of acetic acid is present in 1000 ml of glacial acetic acid.
95.32 ml of glacial acetic acid contains = 99.7 grams of acetic acid
1000 ml of glacial acetic acid will contain 1045.85 grams of acetic acid.
Step 3: Calculate the number of moles of acetic acid present in 1045.85 grams of acetic acid.
60.05 grams of acetic acid = 1 mole
moles
Therefore, we can say that 1 liter of glacial acetic acid contains 17.416 moles or in other words molarity of glacial acetic acid (99.7% w/w, density 1.049 g/ml) is equal to 17.416.
Use Calculator to calculate the Molarity of concentrated acetic acid (CH3COOH) when concentration is given in % by mass (w/w)
The molecular weight of Acetic acid (CH3COOH): 60.05 g/mol
(Change the % (wt/wt) concentration)
Density of glacial acetic acid: g/ml
(Change the density)
Molarity of acetic acid: 17.416 MWas this post helpful?
60.05 grams of acetic acid = 1 mole
1 gram of acetic acid = 160.05 moles.(This looks typographical error)
160.05 moles should be 160.05 mM.