The melting temp of benzoic acid is 122'C. The student's sample was impure. Suggest how the melting temp of the sample would differ from that of pure benzoic acid.
Aan: lower than 122'C. Melt over a range of temp/sharp.
Can anyone explain it? Thank mates
2. now KMnO4 is titrated against Fe(II) solution. When making up the solution of the iron(II) salt, another student, by mistake, added too much dilute sulphuric acid to the graduated flask before shaking the contents so that the total volume was over 250cm3. Explain the effect this mistake would have on the student's volume of potassium manganate(VII) solution used in the titration.
Ans: The volume of potassium manganate(VII) used will be smaller than the correct figure.
can anyone explain? thanks