1. Calculate the acetylsalicylic acid concentration (in mg/mL) of aspirin solution #2 in the Procedure section. Assume that 300 mg of acetylsalicylic acid has been weighed out.
2.3. (3 pts) Calculate the acetylsalicylic acid concentrations (in mg/mL) of solutions A through E and record them in the table below. Underneath the table, provide a sample calculation using the volumes for solution E. The dilution equation is useful for this calculation: M1V1 = M2V2 .
Using Volume 0.040 M FeCl3/0.10 M HCl,
Volume deionized water, and
Volume aspirin solution #2, to find Acetylsalicylic acid concentration (mg/mL).
As it occurred to you that we have no idea what procedure #2 is? Nor do we have any idea what solutions A through E are?
To calculate the acetylsalicylic acid concentration in mg/mL, we need to know the amount of acetylsalicylic acid (ASA) and the volume of the solution.
For question 1:
If we assume that 300 mg of acetylsalicylic acid has been weighed out, and we don't have information about the volume of the solution, we cannot calculate the concentration in mg/mL. The concentration requires both the mass of the solute (ASA) and the volume of the solution.
For question 2.3:
To calculate the acetylsalicylic acid concentration (in mg/mL) for solutions A through E, we need the following information:
- Volume of 0.040 M FeCl3/0.10 M HCl
- Volume of deionized water
- Volume of aspirin solution #2
Using the dilution equation M1V1 = M2V2, where M1 and V1 are the initial concentration and volume, and M2 and V2 are the final concentration and volume, here's how you can calculate the concentration for a sample calculation like solution E:
Step 1: Determine the known values:
- Volume of 0.040 M FeCl3/0.10 M HCl (let's assume it is 10 mL)
- Volume of deionized water (let's assume it is 20 mL)
- Volume of aspirin solution #2 (let's assume it is 25 mL)
Step 2: Convert the initial concentration to mg/mL:
- If the initial concentration is given in Molarity (M), you need to convert it to mg/mL by multiplying by the molar mass of acetylsalicylic acid.
- The molar mass of acetylsalicylic acid is 180.16 g/mol, which is equal to 0.18016 mg/mL.
Step 3: Apply the dilution equation:
M1V1 = M2V2
In this case:
- M1 = 0.040 M (FeCl3/0.10 M HCl)
- V1 = 10 mL (Volume of 0.040 M FeCl3/0.10 M HCl)
- V2 = 25 mL (Volume of aspirin solution #2)
To find M2 (acetylsalicylic acid concentration in mg/mL), we rearrange the equation:
M2 = (M1 * V1) / V2
Step 4: Calculate M2:
M2 = (0.040 M * 10 mL) / 25 mL
M2 = 0.016 mg/mL
Therefore, the acetylsalicylic acid concentration in solution E would be 0.016 mg/mL.
You can use a similar process to calculate the concentrations for solutions A, B, C, and D by substituting the respective volumes into the equation.