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Why is it important for a chmist to stop a titration when the solution is only beginning to change color?
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How could you determine whether phenolphthalein remains in the residue of a titration reaction?
The easiest way is to add back some of the solution you were titrating. If phenolphthalein remains, it will react with the solution and change back to purple. Incidentally, phenolphthalein will always remain in the solution of the titration reaction - it changes color depending upon the pH of the solution, but the indicator itself is not affected by the titration reaction.
Calculate the molarity of 75g CUSO4 -5 H2O in 1.0L of solution?
briefly discuss the errors tahat occur in the above titration and the change in the colour of the indicators.
What is the meaning of the term end point in titration and what is true about the system at the end point?
In titrations, the end point is when you have brought the tested sample to absolute neutral. At this point, if you add one more drop of titrating solution to the sample, you would change the pH sufficient to change the color of the indicator in the sample. This is the point at which you can determine the pH of the original solution, by calculating back the amount of titrating solution you had to add to the sample to neutralize it.
Why does the pH change rapidly at the equivalence point of a titration?
The equivalence point represents a region where the amount of acid to base (or base to acid) concentration is equal. Before the equivalence point there is a greater amount of acid (or base, depending on the titration). After the titration there is a greater amount of base (or acid). This reverse in dominance results in a dramatic change in pH.
Why does the pH drop so fast during titration at a certain point?
When there is a buffer present, the buffer makes it difficult to change the pH of a solution. Say for instance a buffer keeps the pH around 6.5 +/- 0.2 . The buffer only works when the pH is in this range. If too much acid or too much base is added, taking the pH out of this range the pH will change quickly, even if only a little extra base or acid is added to the solution.
Why is important that the indicator is present in the solution during the course of titration?
the reason why a indicator is important in some titration is to show a change in the solution. for example as a solution runs from acidic to basic the indicator may turn a different color. but this is the reason why it is important inmost experiments.
Why is the vinegar diluted before titration?
1. The advantage in diluting the solution before titration is that it allows for greater accuracy in the titration; this is because the color change in the solution is easier to observe if it is a dilute solution.
What can be observed about the rate of change of pH of a solution near the end point of titration?
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What is role of buffer solution in complexometric titration?
buffer solutions resists change in PH
Can a strong base be a biurette solution in titration?
No, because a drop of strong base can change the pH a lot and mess up titration, it has to be a moderate-weak base!
How could you determine whether phenolphthalein remains in the residue of a titration reaction?
The easiest way is to add back some of the solution you were titrating. If phenolphthalein remains, it will react with the solution and change back to purple. Incidentally, phenolphthalein will always remain in the solution of the titration reaction - it changes color depending upon the pH of the solution, but the indicator itself is not affected by the titration reaction.
Why is a white tile used in an acid - base titration?
It makes it easier to see the colour change in the solution after it reaches its endpoint.
Is titration a chemical change?
Titration is a chemical process.
Why do permanganate titration should be done in acidic solution?
coz the oxidation state of manganese ion changes from +7 to +4. as a result Mno2 is formed which is brown in colour hence titration colour change cannot be detected
What is colourimetric titration?
Titration in which the end point is marked by a color change.
What is a potentiometric titration?
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.
Calculate the molarity of 75g CUSO4 -5 H2O in 1.0L of solution?
briefly discuss the errors tahat occur in the above titration and the change in the colour of the indicators.
