Ques 3 d) What is PM indicator? Discuss the theory of PM indicator.
Answers
Answer:
A complexometric indicator is an ionochromic dye that undergoes a definite color change in presence of specific metal ions. ... Complexometric indicators are also known as pM indicators.
Complexometric indicators are water-soluble organic molecules. Some examples are
- Calcein with EDTA for calcium
Patton-Reeder Indicator with EDTA for calcium with magnesiuCurcumin for boron, that forms Rosocyanine, although the red color change of curcumin also occurs for pH > 8.4Eriochrome Black T for aluminium, cadmium, calcium and magnesiuFast Sulphon Black with EDTA for copper
Hematoxylin for copperl.Murexide for calcium and rare earths, but also for copper, nickel, cobalt, and thorium
Xylenol orange for gallium, indium and scandium
Answer:
A complexometric indicator is an ionochromic dye that undergoes a definite color change in presence of specific metal ions. It forms a weak complex with the ions present in the solution, which has a significantly different color from the form existing outside the complex. Complexometric indicators are also known as PM indicators.