Question

Consider the following data on some weak acids and weak bases: acid base name name formula formula HCN hydrocyanic acid 4.9 x 1010 aniline ammonia C, H, NH, 4.3 10-10 NH; 1.8 x 103 hypochlorous acid HCIO 3.0 x 108 Use this data to rank the following solutions in order of increasing pH. In other words, select a 'l' next to the solution that will have the lowest pH, a the solution that will have the next lowest pH, and so on. next to solution 0.1 MCMNHBr 0.1 ANM choose one 0.1 N Nal 0.1 M NACN choose one X 5 ? Explanation Check 2020 M . Education A s Reserved. Terms of Use PVC

Answer 1

Ⓡ. 0.1(M) CHO Nitz Bro gli - 6H5 Mit Bro in the salt of mean base (CCHE ant) and strong and CHB) vo, PH equation will be af pH = 7-14 pkb - 12 loge. pkb = -log kb = -log (4.38 10 10) = 9.366 - pH = [+- 9.366 - Llog (0.1).] = 2.811 0(M) Niace => Nhace in the salt of wean base Cont) ad strong aid (Hel).se, pH equation will be a) pH = 7 14 pky a 1 loge. pkba - loggba-log (118x103) = 4.744 i. pH = 7 4.744 - I log (o. I) => [PH = 5, 128 3. O.I(M) Nal a NOT in the salt of strong acid (HI) and strong bone (Naon NaOH + HI - > Nag + Ho. 50 pH of strong aud and strong base in always a 7.] 6. O.I(M) Maen af Nach in the salt of near and Chen) and strong base (NaOH). Bog pH equation will be =) pH = 7+ Aka + 1 loge. pka : - logka = -log (4.9% 1010), = 9.309 - pH = 7+ 9.309 + log (0-2) =pH = 11: 154 vo. pH order will be of 0.1 (M) NaN) 0.1 (M) Mat & 0.1 (M) NHUY 0.1(M)- ( Hy antz Br.