Question

3.
Why is a burette with pinch
aburette with pinch - cork regulator not used for the permanganate titration?
plz and it fast​

Answer 1

Answer:

Burette with pinch cork regulator is not used for the permanganate titration because permanganate attacks rubber

Explanation:

Permanganate is one of the strongest oxidizing agents used for titrations. In pH 0.0 formal potential of permanganate is 1.5V, but it goes down with increasing pH. In too high pH permanganate doesn't reduce to Mn2+, but (in slightly acidic and slightly alkalic solutions) to MnO2, and in highly alkalic solutions - to MnO42-. All these reactions are used in analytical chemistry, but the most popular is the use of permanganate in low pH solutions.

Burette with pinch cork regulator is not used for the permanganate titration because permanganate attacks rubber