Questionc. Calculate the molar mass of salicylic acid and acetyl salicylic acid (Aspirin).
Studdy Solution
STEP 1
1. The chemical formula for salicylic acid is .
2. The chemical formula for acetylsalicylic acid (Aspirin) is .
3. The atomic masses are approximately: Carbon (C) = 12.01 g/mol, Hydrogen (H) = 1.01 g/mol, Oxygen (O) = 16.00 g/mol.
4. We need to calculate the molar mass by summing the atomic masses of each element in the compound.
STEP 2
1. Calculate the molar mass of salicylic acid.
2. Calculate the molar mass of acetylsalicylic acid.
STEP 3
Calculate the molar mass of salicylic acid ().
- Calculate the total mass of carbon atoms:
$ 7 \times 12.01 \, \text{g/mol} = 84.07 \, \text{g/mol}
\]
- Calculate the total mass of hydrogen atoms:
$ 6 \times 1.01 \, \text{g/mol} = 6.06 \, \text{g/mol}
\]
- Calculate the total mass of oxygen atoms:
$ 3 \times 16.00 \, \text{g/mol} = 48.00 \, \text{g/mol}
\]
- Sum the masses to find the molar mass of salicylic acid:
$ 84.07 \, \text{g/mol} + 6.06 \, \text{g/mol} + 48.00 \, \text{g/mol} = 138.13 \, \text{g/mol}
\]
STEP 4
Calculate the molar mass of acetylsalicylic acid ().
- Calculate the total mass of carbon atoms:
$ 9 \times 12.01 \, \text{g/mol} = 108.09 \, \text{g/mol}
\]
- Calculate the total mass of hydrogen atoms:
$ 8 \times 1.01 \, \text{g/mol} = 8.08 \, \text{g/mol}
\]
- Calculate the total mass of oxygen atoms:
$ 4 \times 16.00 \, \text{g/mol} = 64.00 \, \text{g/mol}
\]
- Sum the masses to find the molar mass of acetylsalicylic acid:
$ 108.09 \, \text{g/mol} + 8.08 \, \text{g/mol} + 64.00 \, \text{g/mol} = 180.17 \, \text{g/mol}
\]
The molar mass of salicylic acid is and the molar mass of acetylsalicylic acid is .
Was this helpful?
