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What is meant by the transition interval of an indicator?
The transition interval of an indicator refers to a range of values within which the indicator shifts from one state to another. It helps determine when a specific threshold or condition has been met, signaling a change in status or action. It is important to define transition intervals to effectively interpret and utilize the indicator for decision-making.
What is the advantage of knowing the pKa of an acid-base indicator?
Knowing the pKa of an acid-base indicator allows us to determine the pH range over which the indicator changes color, making it useful for determining the endpoint of a titration. This information helps in selecting the appropriate indicator for a specific titration and ensures accurate results.
How you select that which indicator should be used in any titration?
The selection of an indicator for a titration is based on the pH range over which the titration will occur. The indicator should have a color change that aligns with the pH at the equivalence point of the titration. Choosing an indicator with a pH range that encompasses the equivalence point will ensure accurate endpoint detection.
What criterion is used in selecting an indicator for a particular acid-base titration?
The key criterion for selecting an indicator for an acid-base titration is that the indicator's color change should occur close to the equivalence point of the titration. This ensures that the indicator accurately signals when the reaction is complete. The pH range over which the indicator changes color should match the pH range around the equivalence point.
What makes a good pH indicator?
A good pH indicator should have a distinct color change at a specific pH range, be soluble in the solvent being used, and be stable over a range of conditions. It should also be non-toxic and easy to use.
What is the name of the indicator that gives you the range of colours for different pH numbers?
The indicator that gives you the range of colors for different pH numbers is called universal indicator. It is a mixture of several indicators that changes color over a wide pH range.
What does a typical acid base indicator exhibit its colour change over range of?
Its colour changes over a range of Ph values.
What is meant by the transition interval of an indicator?
The transition interval of an indicator refers to a range of values within which the indicator shifts from one state to another. It helps determine when a specific threshold or condition has been met, signaling a change in status or action. It is important to define transition intervals to effectively interpret and utilize the indicator for decision-making.
What is the advantage of knowing the pKa of an acid-base indicator?
Knowing the pKa of an acid-base indicator allows us to determine the pH range over which the indicator changes color, making it useful for determining the endpoint of a titration. This information helps in selecting the appropriate indicator for a specific titration and ensures accurate results.
Why does the typical base indicator exhibit its color change over a range of about 2 PH units?
The usual range of the color change on the indicator is between 1.5-2 pH units because of the sensitivity of the indicators. The universal indicator is used in most test.
What color will a purple solution turn to when added to a solution of pH 10?
The pH 10 solution will turn purple because the purple color is stable over a wide pH range. However, if the purple solution contains an indicator that changes color at different pH values, it may undergo a color change.
What is so special about universal indicator?
Universal indicator is special because it is a pH indicator that can change color over a wide range of pH levels (from acidic to basic). This makes it a versatile tool for quickly determining the pH of a solution by observing the color change, which can be useful in various experiments and applications.
How you select that which indicator should be used in any titration?
The selection of an indicator for a titration is based on the pH range over which the titration will occur. The indicator should have a color change that aligns with the pH at the equivalence point of the titration. Choosing an indicator with a pH range that encompasses the equivalence point will ensure accurate endpoint detection.
Why does bromocresol green indicator give a different titer value than phenolphthaline indicator?
Bromocresol green changes color over a broader pH range (3.8-5.4) than phenolphthalein (8.2-10.0), leading to a different endpoint in titration. This difference in color change can result in slightly different titer values when using the two indicators.
Who invented the universal indicator?
The universal indicator was developed by Arnold J. Olsen in 1933. It is a mixture of several different indicators that change color over a wide range of pH levels.
Why is bromocresol green a good indicator?
Bromocresol green changes color over a pH range of 3.8 to 5.4, making it suitable for acidic to neutral pH ranges. It has a distinct color change from yellow to blue, which is easily visible to the naked eye. Additionally, it is stable and has a long shelf life.
What criterion is used in selecting an indicator for a particular acid-base titration?
The key criterion for selecting an indicator for an acid-base titration is that the indicator's color change should occur close to the equivalence point of the titration. This ensures that the indicator accurately signals when the reaction is complete. The pH range over which the indicator changes color should match the pH range around the equivalence point.
