Question

dotiudiculiududuut 2 30 Consider the buret above, If before starting the titration, the buret was read at 0.10ml NaOH, how many mls of NaOH have been added? ס 30 . 00 O 30.10 28.80 29.00

please answer all parts!! thank you

Answer 1

1. Volume of Nach added - 28.90 -0.10 – 28.80 mL 2 moles of NaOH = MXV 1000 0.100 X SH 28.80 ?=0.00288 mos 1000 3. To obtain a good titration curve it is necessary to add the NaOH very slowly just before and at the end point. Because it is necessary to get the ca exact end point. Sulphuric acid required twice as much NaOH as it is required for acetic acid. Because H₂SO, is dibasic acid and Aceticacid is monobasic. H₂SO4 + 2NaOH - Na₂SO4 + 2H₂O CH, Cool + NaOH - CH2COONG + H2O HCl + NaOH Nach + H₂O - Formula, mille ma vie 0.2 x 24.97 T m, = my wax = 027 - X- 0.199760 I 25 2. molarity of HCl = 0.19976 M 2 0.2m 6. pH + pOH = 14 + POH = 14-10 = 54 And poll ---Log Cont] > [OH-] = 10-p" => [OH-] = 104 m 7. End point: an equivalent number of moles of base has been added to the sample of acid being titrated.