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Why did the solution turn to pink at the end of the titration?
because the solution react with sulphuric acid. other than that, the end point is indicated.
Why did the solution turn to pink at the of the titration?
because the solution react with sulphuric acid. other than that, the end point is indicated.
What happened if some solution splashes out during the titration of NaOH?
If some solution splashes out during the titration of NaOH, the volume at the end point will be wrong.
Why don't we use indicators in redox-titration?
Because the end point can easily be observed. Example: consider the titration between potassium manganate (IV) which is purple and ammonium iron (II) sulfate - colourless. At the end point the colourless standard solution will turn pale pink when the correct volume of deep purple titre is added. No indicator is required. Also this is not necessarily an acid base rxn
What can be observed about the rate of change of pH of a solution near the end point of titration?
S
Why did the solution turn into light pink at the end of the titration?
The pH was changed.
Why did the solution turn to pink at the end of the titration?
because the solution react with sulphuric acid. other than that, the end point is indicated.
Why did the solution turn to pink at the of the titration?
because the solution react with sulphuric acid. other than that, the end point is indicated.
What happened if some solution splashes out during the titration of NaOH?
If some solution splashes out during the titration of NaOH, the volume at the end point will be wrong.
Why don't we use indicators in redox-titration?
Because the end point can easily be observed. Example: consider the titration between potassium manganate (IV) which is purple and ammonium iron (II) sulfate - colourless. At the end point the colourless standard solution will turn pale pink when the correct volume of deep purple titre is added. No indicator is required. Also this is not necessarily an acid base rxn
What can be observed about the rate of change of pH of a solution near the end point of titration?
S
Why titration of weak acids and weak bases are not done?
It is difficult to determine the end point of such a titration, because the titration produces a buffer solution that changes its pH very slowly at the end point, in contrast to reaction between a strong acid and strong base.
Why is titration repeated without indicator?
In a titration the pipette is used to transfer 25 cm3 (usually to ±0.05 cm3) of a solution into a conical flask. Another solution that reacts with the solution in the conical flask is carefully added from a burette until it has all exactly reacted. This is called the end point of the titration (or equivalence point of the reaction). There needs to be a way of knowing when the end point is reached. An indicator may be needed. Often a titration is repeated until successive titres are within 0.1 cm3.
Discussion of titration?
Titration is the controlled addition and measurement of the amount of a solution of known concentration required to react completely with a measured amount of a solution of unknown concentration. Titration provides the equivalent volumes of acidic and basic solutions. In order to find this, MaVa/Ca formula needs to be used. In titration, when equal numbers of H3O+ and OH- from the acidic and basic solutions react, the resulting solution is neutral (water and salt). In titration, the end point would be the point at which the indicators change color; in this case the indicator turned pink. The equivalence point would the point at which the two solutions used in titration are present in chemically equivalent amounts. The indicator, phenothaylene, is used to determine the equivalence point of weak-acid/strong- base titrations.
In permanganometric titration what is the the self indicator and how does it work?
permanganate is the self indicator.At the end point it changes the colour to a slight pink colour.
What is the function of NH4CNS in estimation of the amount of copper present in a supplied solution by iodometric method?
The end-point of the titration is more sharper if NH4CNS exist in the solution;
What is the function of phenolphthalein in titration?
to determine the end point of titration
