Question

Need help with calculations!!

CHEM 202 Chemistry of Acids & Bases-Parts 1 and 2 College of the Canyons Data L Nt CX Table 2 . Solutions of Ammonium lon-Ammonia Acid, base, or Experimental pH neutral? Solution [NH.cil, M INHs), M 0.10 1.0 0.050 0.05 0.50 0.10 5.81 5 .22 1. 33 10.81 0.50 Calculations 1. Determine [H,O'] ] for each solution using your experimental data above and enter the data in Table 3 below Show one representative calculation below. -.10 ラ-81 2. The concentrations of (NH.CI] and [NHo] will need to be calculated using the ICE-box method before they are entered in the table below. Show one representative calculation. (Attach arn additional sheet of paper to this lab if necessary.) Ο.IO E 0.10-х Calculate Kg and pK, for the ammonium ion and enter the values in Table 3 below. Show at least one representative calculation below: 3. Ka INH4) lo Table 3. Determining Ko and pKo for Ammonium ion. [0'1, M Solution | [H3O*), Μ | [NH3], M | [NACI], M | Calculated Ko | Calculated for NH4 pKo for NH4 1.5xI0 .5x 4.7 10 Io 1.5x1O- Not reqd Not req'd

Answer 1

SATURDAY 27 20 29 30 2017 DAYS 042-323 AS NHC is a salt of leeak base NHa) and staem 10 1.8 x1Ơ5 OR NH 0 0.lo M 04 05 0-10 X5 55 X10-10 SUNDAY and pti: 5.13 log

20 21 22 23 24 1o MONDAY 28 044-321 DAYS 2017 5, 55% lo-10- 10 しょー2.34 x 10-5 M 12 H21 63 01 for solution c, LNHyaj, 0.05-anal ENH3J-o,05 M T 0.05 0 05 0:05 t χ 06 06 5-55x10-、-- 005 13 0 . 0.5-21 % 0,05 "Xt 0,052-...(0,24 15.xio-a): O r th 01 一5: 55 X10.t. M

10 01 pH 03 04 “T 0-10 0-10-x 06 INH, 010-χ 200134 OH-E0 00134M

27 26 0469 DAYS 2012 0 00134 03 10 0 01 5, 55%10-10.19.26 02 03 04

Ka for ammonium ion is equal to the value of hydrolysis constant (Kh) that we calculated for ammonium ion

So, Ka for ammonium ion = 5.55 x 10^-10

pKa = 9.26