Question

AGIOS ANO BASE Calculating percent dissociation of a weak acid Alexander In a 2.2 M aqueous solution of 4-chlorobutanoic acid (CH.CICO,H). what is the percentage of 4-chlorobutanoic acid that is dissociated? You can find some data that is useful for solving this problem in the ALEKS Data resource. Round your answer to 2 significant digits. % 0 x 5 ?

Answer 1

Onte I' Given and is :- 4- Chlooo butanoic acid. As a weak quid and it dissociates 08:- (Also coustout ICE table) CO CH2CH2CH2COOH. H + COCH, CH, CH.000 0 0 +x +x. ___ 22-2 x x - Now, the equilibrium expression for this reaction. -Ka [H+3EER CH2 CH2 CH2-C00"} 2:2 - X 1₂ CH₂ CH2 Cook] Noely we know, kakou 4- Chlorobutanoic acid = 3.01810 'i 3.01x105 = (x) c«) , a yon kanya Now, as it is a weak acid st dissociates to a small extent a will be very small x can be neglected as compared to 2:2 242-X 2:2012- +3.01810-8 m i n T = 3.01 X10x2: 2 0 am >12 = 6.622x103 Foton >> X = 6.622x10-5 tons s on? La = 0.813 3 Xlo- 2 g Soy We can say [H+} == 2 = 0.8137-810121?_ --Now, to find the percentage dissoutation of aud; I disociation = CH'S X 100 12 Home [ Aud) bis 1 = -0.8137 X10-2 Xlood 22 0 :3695 = 0.37%, (two significant figures? ( U