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So you can swirl the contents around without spilling them. =]
to acidify the solution
The indicator will change color as the pH changes.
Usually there is no indicator needed in potassium permanganate titrations as there will be an excess of manganate ions in the conical flask, turning the solution from colourless to pale pink.
during a titration when a titrant completely furnished the sample then this is the end point of titration.
So you can swirl the contents around without spilling them. =]
So that no extra moles of NaOH were present in the flask.
to acidify the solution
The indicator will change color as the pH changes.
Usually there is no indicator needed in potassium permanganate titrations as there will be an excess of manganate ions in the conical flask, turning the solution from colourless to pale pink.
The reaction between NaOH and H2SO4 is highly exothermic, meaning it releases heat. When the solutions are mixed in the conical flask and shaken during titration, this reaction occurs and produces a significant amount of heat. Additionally, the presence of phenolphthalein might contribute to the sensation of heat as it can change color when exposed to heat or pH changes, indicating the progress of the reaction.
during a titration when a titrant completely furnished the sample then this is the end point of titration.
An Erlenmeyer flask, commonly known as a conical flask or E-flask, is a widely used type oflaboratory flask which features a conical base and a cylindrical neck. They are usually marked on the side (graduated) to indicate the approximate volume of their contents. It is named after the German chemist Emil Erlenmeyer, who created it in 1861.
This is far to be a rule for this titration.
so that the solutions mix properly
A potentiometric titration is one in which the end-point is detected by measuring the change in potential of a suitable electrode during the titration.
During a precipitation titration an insoluble precipitate is formed.Complexometric titration is a type of volumetry which use as titrants EDTA or other similar reagents.