When 22.63 mL of aqueous NaOH were added to 1.214 g of cyclohexylaminoethanesulfonic acid (FM 207.29, structure in Table 8-2) dissolved in 41.37 mL of water, the pH was 9.24. Calculate the molarity of the NaOH.

Table 8-2

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A(pKa/AT (K) Formula Name Structure u = 0.1 M mass CH,CO,H H,NCCH,NH - (CO,H) 1.59 190.15 N-2-Acetamidoiminodiacetic acid CH,CO,H (ADA) N-Tris(hydroxymethyl)methylglycine (TRICINE) (HOCH,),CÑH,CH,CO,H 2.02 (CO,H) 179.17 -0.003 Phosphoric acid H;PO, 2.15 (pK) 1.92 98.00 0.005 NN-Bis(2-hydroxyethyl)glycine (HOCH,CH,),NHCH,CO,H 2.23 (CO,H) 163.17 | (BICINE) ADA (see above) 2.48 (СO,H) 2.31 190.15 Piperazine-N,N'-bis(2-ethanesulfonic acid) (PIPES) -o,SCH,CH,NH HNCH,CH,So; - (pKi) 2.67 302.37 OH HO,CCH,CCH,CO,H CO,H Citric acid 3.13 (pKj) 2.90 192.12 -0.002 Glycylglycine H,ÑCH,CNHCH,CO,H 3.14 (CO,H) 3.11 132.12 0.000 Piperazine-N,N'-bis(3-propanesulfonic acid) (PIPPS) "o,S(CH,),NÍH HN(CH,),SO, - (pK) 3.79 330.42 Piperazine-N,N'-bis(4-butanesulfonic acid) (PIPBS) "0,S(CH,),ÑH HN(CH,),SO, 4.29 358.47 ('yd) – NN'-Diethylpiperazine dihydrochloride (DEPP-2HCI) CH,CH, NH HNCH,CH, 2CI - (pK) 4.48 215.16 Citric acid (see above) 4.76 (pK2) 4.35 192.12 -0.001 Acetic acid CH;CO,H 4.76 4.62 60.05 0.000 o,s(CH,),NHCH,CH,HN(CH,),So, – (pK,) 5.62 360.49 NN'-Diethylethylenediamine-N,N'- bis(3-propanesulfonic acid) (DESPEN) CH,CH, CH,CH, 2-(N-Morpholino)ethanesulfonic acid (MES) Citric acid NHCH,CH,SO, 6.27 6.06 195.24 -0.009 (see above) 6.40 (рК3) 5.70 192.12 0.002 NN.NN'-Tetraethylethylenediamine dihydrochloride (TEEN 2HC1) EL,NHCH,CH,HÑE1, 2CI - (pK) 6.58 245.23 (HOCH,),CNH,(CH,),NH, 2CI 1,3-Bis[tris(hydroxymethyl)methyl- amino] propane hydrochloride (BIS-TRIS propane-2HCI) 6.65 (рK,) 355.26 (HOCH,),Ć ADA (see above) 6.84 (NH) 6.67 190.15 -0.007