Question

Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids. Note: be sure each number you put in the table has the correct number of significant digits. acid pK relative strength K 9.5 x 102 2.88 x 10-9 (Choose one) (Choose one) 6. x 10-6 (Choose one) Continuo

Answer 1

Solution - let, these acids area B) c) HA HB HC weak acids are not completely dissouutes and there is equilibrium, u librium fo HA Ht + Á Kg = [HP] [] -- 9.5 10 (Given) CS Scanned WHAJ CamScanner

. HB - H+ + B Kag = [H+; (B) = 2.88x109 THB3 C) ne - ut to Kas = [ H+Jafci. 6.0x166 CHOJ 1 pka = -log[ka] A) pka = -log (9.5 x1032) 1 pka = 1.02 B) pka= -log[288x169) pka - 8.54 1 c) pka= -log[ 6.6x1067 1 pka= 5:22 I aKa of these auds shows the dissociation of auds. More the ka so more the dissociation it means more Ht and more it more the acidic strength & pka is the Negative logarithum of Ka. So c harred upka bess the acidic strength. CamScanner

So acidic strength order of these ands ... A B least acidic Most audio or Relative strength Ag stronger acid as compare to a Strong and as compared to B B is weak and acids among these three auds. / Taud ka. I pka A 19.5 x10² 1:02 B 12.88x10.9 8.54 c 6.0x1065.22 . Relative strength A is stronger aud among these quids IB is weakest alid among I these ands. Ic is strong and then B but weak and than A. Scanned with CamScanner