Question

C 1. The Value Of Ka For Hyd yanic acid Go x W Table of Acid and Base Str ml?elSBN =9781305657571&id-5117883128snapshotld 1226339& X Q Search this course Determine the pH during the titration of 16.3 mL of 0.328 M hydrobromic acid by 0.159 M potassium hydroxide at the following points: (1) Before the addition of any potassium hydroxide (2) After the addition of 16.8 mL of potassium hydroxide (3) At the equivalence point (4) After adding 42.3 mL of polassium hydroxide Submit Answer

Answer 1

Criven - 16.3 me 16.2 me 0.326 m - HBr Strung Aud) 0.328 na KOH; Strong Bafe - 0169m y Before addition of kon. ph of Streong Alld pr. - log Cut) [ht) molarity pus-log (0:328) ph = 6.484 27 After addition of 16.8 me of Potensi kon Heutralisation takes place Lone of the - Starts decreasing which affect ph mixing of strong acica & Strong Base mivi -mana - ml vi tus) 0-328 X 16.3 - 0 159 168 = M( 168 +163) M = 0.080 ( solution) - Cut] Hla (0.080) ph -log che) - a -log(0.080) p4 , 1.09

i) At equivalence poine (ht] con pu: 7 solution - neutral After addition 423 me of kou. mv, - m2v2 = m( vita) » 0.328x163 - 015942.3 = x (16 37 42-3) 7 m2-0023 pon It me ane the it is the conc. of - excess ons which Condribute to pon. - log (or) : - - log (20.023) ph = 1.638 pn tpor, tebe 14 - pla 14 -1.638 ph. 12.362