Chemistry

posted by .

Mass of an aspirin tablet is 0.42g and contains 77.38% ASA by mass.
I dissolved the tablet in hot naOH and cooled the solution with distilled water to the mark of 250 volumetric flask.
Then I pipetted 5.0 mL of the solution to the 100 mL volumetric flask and I diluted it with FeCl3 solution to the mark.

How do I find the concentration of the solution?


concn in what? In the final 100 mL solution?
0.42g x 0.7738 = g ASA in 250 mL.
You took 5/250 and diluted to 100. That is g/100 mL.
If you want molarity, then mols/L = M.
Post your work if you get stuck.

How can I get the cocnentration mg/L?

You have g/100. Let's just say that is 0.12 g/100 mL. Then, that is
0.0012 g/mL. Convert to g/L.
0.0012 g/mL x 1000 mL/L = 1.2 g/L
Convert to mg.
1.2 g x 1000 mg/g = 1200 mg/L.

Oh alright! Thank you!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. molarity

    An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  2. chemistry

    An aspirin tablet weighing 0.502 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  3. chemistry

    An aspirin tablet weighing 0.502 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  4. chem

    An aspirin tablet weighing 0.650 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  5. chem

    An aspirin tablet weighing 0.650 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  6. chemistry

    An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  7. Chem.

    An aspirin tablet weighing 0.400 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  8. college chemistry

    An aspirin tablet weighing 0.502 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  9. Chemistry

    An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …
  10. chem

    An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. …

More Similar Questions