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Why should a constant amount of indicator be used in a titration?
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∙ 13y ago
Indicators are weak acid. Too much will alter the titre
Juliet Olson
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When do you know endpoint of titration?
when the colour of the indicator used is the color it should be in neutral
Why should a constant minimum amount of indicator be used in titrations?
Indicators are weak acid. Too much will alter the titre
What colorimetric pH indicator should you use for ammonia and hydrochloric acid titration?
Since the titration is between a strong acid and a weak base, methylorange should be suitable as the equivalence point is around pH 5. The K of the indicator should be equal to the pH at the end point. Methyl orange is that indicator
Why is thymol blue used as the indicator for titration of acetic acid and naoh?
An indicator that changes its colour around pH value 5 should be used in this titration. Alternatively, instead of Thymol Blue, Methyl Orange or Methyl Red may be used.
What is the color of end point for the titration of the acid?
It is dependent on the indicator used. The direction of the reaction should be stated to indicate a color change. For example, if the acid is in the flask, methyl red changes its color from red to yellow.
When do you know endpoint of titration?
when the colour of the indicator used is the color it should be in neutral
What creteria is used for chosing an indicator in acid base titration?
pH range of indicator should be in the rapid pH gradient.
If the equivalence point of a titration is 5 what range of pH should the indicator be?
The indicator should change color right at the equivalence point, so 5.
Why should a constant minimum amount of indicator be used in titrations?
Indicators are weak acid. Too much will alter the titre
What colorimetric pH indicator should you use for ammonia and hydrochloric acid titration?
Since the titration is between a strong acid and a weak base, methylorange should be suitable as the equivalence point is around pH 5. The K of the indicator should be equal to the pH at the end point. Methyl orange is that indicator
Why is thymol blue used as the indicator for titration of acetic acid and naoh?
An indicator that changes its colour around pH value 5 should be used in this titration. Alternatively, instead of Thymol Blue, Methyl Orange or Methyl Red may be used.
Why should the endpoint be taken as the faint pink color of the indicator?
When using an indicator in a titration, the color changes happen when the titrant has reacted with all the substance of interest in the sample. As soon as the titrant isn't reacting with the sample any more, it starts reacting with the indicator, and continuing past the first hint of color will be using too much titrant, and the calculations for the concentration of the sample will be wrong. Phenolphthalein starts out pink, but will turn red as the pH keeps changing as you go further past the endpoint of the titration.
The total amount of energy in the univeres changes?
No, it should remain constant.
Why you use two indicator?
Because the end-pointsof these titrationshave different pH values. A strong acid / strong base titration has an endpoint of pH 7, and an indicator that changes near 7 is useful. Phenolphthalein changes around pH 8.5 which is close enough for government work (so to speak).A strong acid - weak base titration will have an endpoint below 7, and so an indicator that changes over a range that is less than 7 should be used. Methyl orange changes around pH 4.
When should back titration used instead of back titration?
when we do not know nothing about the other titrant.
What is the color of end point for the titration of the acid?
It is dependent on the indicator used. The direction of the reaction should be stated to indicate a color change. For example, if the acid is in the flask, methyl red changes its color from red to yellow.
Why must the water cycle be balanced?
It should be balanced to regulate water. The amount of water should be maintained constant.
