Question

1. Classify the type of titration for the following: a) HCl against NaOH. b) FeCl, against KMnO. C) NSO, against EDTA. d) NH.SCN against AgNO.. 2. What are the factors affecting the solubility of a precipitate? 3. In titration of acetic acid against NaOH, it can be noticed that, before the equivalence point, the slope of the curve is not as steep as in the case of HCl and NaOH titration curve, explain and draw a schematic diagram of the titration curve in both cases. 4. In Fajans titration method, an indicator must be chosen that, it is not too strongly or too weakly adsorbed. Why?

Answer 1

Ques Solve (a) Haris an acid and Naol is a base. The Reaction of acid and base is known as acid-base reaction or neutralisat- -ion reaction. HCl + NAOH → Naci+HO Thus, it is an "Acid-base titocation". (6) kMnoy is an oxidising agent, its oxidise Feclz and kMnoy its seduces, 8HCl isfecla + k mnou → 5FeCl2 + Mnch + KCl + 4H2O In this reaction, oxidation and reduction take place simultane- Dusly, known as Redox reaction. Thus, it is a "redox titocction". CS CamScanner Stahned with

(C) EDTA is a perlydentate ligand and If form complex with N;2+ Reaction isN;2+ + Esthun Ni(EDTA?) (complex) Thus, Ni?t form complex with EDTA. Thus, it is a complexo metoic titoution". (d) Silver nito ate (Ag Nos) reacts with Ammonium thiocyanate CN Hy S(N) to form precipitate. Reaction is + NHY SCN1990) PAN(9) + NH4NT, (precipitate) Chuanitisera precipitation reaction" og "Precipitation fitocation' Ag NO3 (aq) 0990 -Scanned with