Question

how do I prepare the 100mg/L of asprin acetaminophen and caffeine solution

and dilute that solution with 1a% acetic acid to creat 50, 10 and 5mg/L solutions

Preparation of Standards: Using a 100ML volumetric flask and 1 % acetic acid solution (prepared in hood from glacial acetic acid using a 1000mL beaker and 10mL graduated cylinder), prepare and label a stock solution of 100 mg/L each of aspirin, acetaminophen, and caffeine combined together in a single volumetric flask. Using appropriate dilutions with the 1% acetic acid, prepare and label 50, 10, and 5 mg/L additional calibration solutions. Using the syringe filter, filter

Answer 1

• stock solution: 100 mg litre 1 procedure :- Take 100 mg of aspirin & dilute it to 1 eltre ( 1000 mi) using 1% acetic acid. Similarly prepare each solution of acetamino- phen of caffeine by taking 100 mg of compound & dilute it to 1000 ml using 1% acetic acid. • i 100 mg compound Dilute to 1 litre using It acetic acid. Additional calibration solutions are prepared as follows: @ 50 mg/L 100 mg/L stock soin is prepared by taking 100 mg of compd. & dissolve it to 1000 ml? Therefore 50 mg/L son is prepared from 100 mg/L sol" as follows: (perform 100 50 1000 ? cross multipli- cation) .: 50 mg/l sol. = 1000 x 50 100 = 50000 1oo = soo ml - Take 500 ml of 100 mg/L stock solution & dilute it to 1000 ml (1 litre) using 1% acetic acid

• similary prepare other two 50 mgle solo by taking 500 mi of 100 mg/L stock son. & dilute it to 1 litre by 1% acetic acid. 6 10 mg/L :- similar calculations are preform: 100 - 1000 Jo - 9 .. = 10 x 1000 10000 - loo mi Too 100 - Take 100 ml stock son of 100 mg/L & dilute it to I litre using 1% acetic acid. gives lo mg/L soin similary prepare other two solutions. © 5 mg/L :- Again a similar calculation Joo 1000 perform: 5 - ? • 1000 x5 5000 -= so mi Too Too Take 50 ml stock soll & dilute it to I litre using 1 1 % acetic acid gives 5 mg/L soll similary prepare other two sons by taking 50 ml of their stock sol. & dilute it to I litre by 1% acetic acid.