Question

please explain, no clue whats going on.

' LLT UT Aspirin (C,H,04; M = 180.2 g/mol; pk, = 3.5) and Ibuprofen (C13H1809; M = 206.3 g/mol; pK, = 4.9) are over-the-counter acidic drugs used for relieving pain and reducing fever. Consider a 300 mg tablet of Aspirin and a 600 mg tablet of Ibuprofen. Relative pH Homework – Unanswered Which of these tablets will generate a more acidic solution when dissolved in 250 ml of water

Answer 1

weight of Aspirin = 300mg molar man = 180.2 9 img = 0.cold 300mg = 0.3g mol of Aspirin = given man Molar muss mol = = 0.00166 mol 0.38 180.2 g Moly concentration y Aspirin sol = mol volume Im = 0.001L 250mL= 0.25L Concentration = 0.00166 mol 025L = 0.0067M so concentration 9 Aspirin = 0.0067M similarly finding concentration of Ibuprofen mass of Ibuprofen = 600mg 1 = 0.6g molar mam = 206'3E mol I l bu progen = man = 0.64 = 0.00295ml . molarman 206:3gmort mol Concentration Ibuprofen = 0.00291 = 0.0116 M 0.25L

concentranim g Aspirin = 0.0067M pra= 3.5 þka = -log(ka) 3.5 = -log(Kg) 10-3.5 = ka 0.000316 - ka 0.04 00 coon initial como 0.0067 change - -x At equilibrium 0.0067-8 kas [ docon] [**] [ero cons] 0.000316 - x 220.0067 neglecta (0.0067-2) 0.000316 - x² 0.0067 2.12 x 10-6 = x2 12:12 x 10 0:00146 = x ALDO 0.00146M = 04C47 = so concentration of ht=0.00146 M

| bubmkh c)3802 рқа- Ч:4 ka = (26x los * Cygno, +и+ Сізко, +, о ? 2 inisial О-о 116 = (harge А+ oogle -х equilibrium ка. С<st10.:) L-*) Гc13° 02] 1 X 102 (x) (x) б•o 1) 6-х ('a6x (ors: O'o4le 1.4 16 я* - ** 0 - 00038 = x Си+)= х = o ooo3 € = 3.xјом from Aspirin [41]= 1.46810²m For greater the acidity solution is more Greater me (ht], so pom Aspirin acidie