Question

A 55.0 mL sample of 0.24 M HNO3 is titrated with 0.15 M C6H5NH2.

Determine the pH at these points:

a. At the beginning (before base is added)

b. After adding 50.0 mL of C6H5NH2

c. After adding 75.0 mL of C6H5NH2

d. After adding 100.0 mL of C6H5NH2

Answer 1

11:15 PM 82.0KB/s & alul 3D PAGE NO. DATE: 1 Anda 55ml, 0.24M HNoz Strong acid [Fs Note] 0.15M weak base Các + + HN ç Hg NH₃ + + No GHINHA , kb. 3.8x1ö lo a.) PH -dog Cht] -log (0.24 0.619 b2 G Hg WH + Hz & H&N Hy t nog 75mm 13.2 5.7 mm 45 mm HNO3 H+ + Noz Cung] = siz Vy limit 5.7 los pH a -vloglit] -ley [Site 1.265

11:15 PM 2.3KB/s & 12, 31 92 CHsNHZEINO CHINH + + hoz T25 13.2 mm T.IS 11:25 HNO3 HI ENO [HNOJ 495 (ml) 1.95 130 PH . -dog (1095) = 1.82 d) C6H, NH + Hnuz GHE NH T & Me T5 mm 13.2mm 1.8mm 13.2mm buffer por pky + dog SCA [base] 9.42 + loghi To8 lut pH 10.28 then pH = 3.71