What happens when you add too much indicator in titration?

If a large amount of indicator is used, the indicator will effect the final pH, lowering the accuracy of the experiment.

What happens if you add too much phenolphthalein to a titration?

The intensity of the color is concentration dependent, so if a large amount of phenolphthalein is present the color could be very strong at the end-point. However, the presence of a large amount of phenolphthalein is not usually the reason a titration mixture has an intense color.

What will be the result if the indicator solution added more than 3 drops?

If more than 2–3 drops are used, we would need more amount of base to neutralize your indicator. Thus, end point would shift to a slightly higher value. This would make the acid appear more concentrated than it really is.

What happens when you add more phenolphthalein to an acid?

Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions….Phenolphthalein.

Names
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Properties
Chemical formula	C20H14O4

How much indicator should be added to a titration?

You just need enough so that the color is visible once the pH becomes basic enough. If you were titrating a large volume, you might need more than a couple of drops, but 2 drops is enough to be sure that the color will be visible in a typical lab-scale titration vessel. One drop would probably even work.

What happens if a solution is over titrated?

Effect: The molarity would be smaller. Overshooting the endpoint would cause the final volume reading to be a higher a higher value in the buret.

Does phenolphthalein affect pH?

Phenolphthalein changes colour between a pH of roughly 8 – 10, which fits nicely within the range of the equivalence point of these titrations making them useful. Indicators like methyl orange for example, change colour at about pH 4, well away from where the equivalence point will occur.

What happens if you choose the wrong indicator in a titration?

In contrast, using the wrong indicator for a titration of a weak acid or a weak base can result in relatively large errors, as illustrated in Figure 17.3. In contrast, methyl red begins to change from red to yellow around pH 5, which is near the midpoint of the acetic acid titration, not the equivalence point.

Why is it important not to add too much indicator dye when carrying out a titration?

It does affect titration because if you add too much, then it will alter the concentration of whichever solution you are adding it in. If you added it to the acid, it will cause that acid to be more acidic than you may have calculated.

What happens when a few drops of phenolphthalein is added to an acidic and a basic solution?

Nothing will happen beacause: Phenolphthalein is an acid/base indicator. It is colorless when it is an acid and pink when it is a base.

Why doesn’t the indicator affect the titration results?

In all titrations, the amount of indicator added to the solution to be titrated is just a small amount. This is because even at very low concentration…

What does an indicator do in a titration?

In a titration, you determine an unknown concentration of a sample by adding a second reactant of known concentration. In many titrations, you use a chemical called an indicator, which lets you know when the titration finishes.

What happens when an indicator is added to a titrant?

An indicator is also a weak acid or base. If they are added in large quantities, they would also consume the titrant and interfere with the actual reading.

Why do we use indicators in acid base titration?

If you’re doing an acid-base titration, the presence of larger quantities of a chemical that undergoes acid-base reactions is going to influence the amount of acid or base that’s being absorbed by the reaction, so you want to have a smaller amount of indicator so that it doesn’t alter the computed position and quantities involved in the titration.

What can go wrong in titration?

Several factors can cause errors in titration findings, including misreading volumes, mistaken concentration values or faulty technique. Care must be taken as the solution of the known concentration is introduced into a specific volume of the unknown through laboratory glassware such as a burette or pipette. What is the formula for titration?

How do you find the molarity of a titration?

If the titrant and analyte have a 1:1 mole ratio, the formula is molarity (M) of the acid x volume (V) of the acid = molarity (M) of the base x volume (V) of the base. (Molarity is the concentration of a solution expressed as the number of moles of solute per litre of solution.)