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Phenolphthalein is commonly used in acid-base titrations because it changes color at a pH range of 8.2-10, making it ideal for determining the endpoint of the titration. It is also used in complexometric titrations to detect the presence of metal ions, as phenolphthalein can form colored complexes with certain metals.
What else can I help you with?
What kind of indicators are used in precipitation titration?
Indicators used in precipitation titrations are typically complexometric indicators that form colored complexes with the analyte ions. These indicators change color when the endpoint of the titration is reached, signaling the completion of the precipitation reaction. Common complexometric indicators include EDTA, Eriochrome Black T, and Calconcarboxylic acid.
How do you find the pH of a solution using a universal indicator?
pH indicators are usually weak acids or weak bases that change their color depending on their dissociation (protonation) state. Sometimes both forms are colored, sometimes only one. In most cases you may assume that to completely change color of bicolored indicator pH must change by 2 units. However, human eye is more sensitive to some colors than to others, thus some color changes can be perceived over wider pH range. pH indicators can be used to check pH of the solution, although they are rarely added directly. Only in acid-base titrations indicator should be added to the solution. To check pH it is much more convenient to use pH strips. It is worth of noting here that pH strips are nothing else but pieces of paper impregnated with indicator or a mixture of indicators.
What Changes color in acid and bases?
They aren't. Most acids are colorless liquids (sometimes with a yellow/green hue) and most bases are white or yellow-white. What you are thinking of is universal indicator, which is an organic compound that turns red at a low pH (acidic) or blue at a high pH (basic/alkaline).
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.
Does salt water change the color of phenolphalen or litmus paper?
Litmus at a pH of 7 (which is nominally what an NaCl solution should have at room temperature) is a kind of purple color, somewhere between the "red" acidic form and the "blue" basic form. As with many indicators, the color change happens over a range rather than at a specific pH; the range for litmus is from around 5 (red) to 8 or so (blue).
Why and when phenolphthalein used as the indicator?
There are a lot of indicators around. Choosing which one to use depends on what you're analyzing for, what pH the endpoint happens at, what kind of reaction is happening in the flask, etc. Some common ones are Methyl Orange, Methyl Red, Starch, Bromphenol Blue; the list goes on.
What kind of indicators are used in precipitation titration?
Indicators used in precipitation titrations are typically complexometric indicators that form colored complexes with the analyte ions. These indicators change color when the endpoint of the titration is reached, signaling the completion of the precipitation reaction. Common complexometric indicators include EDTA, Eriochrome Black T, and Calconcarboxylic acid.
What kind of indicator paper turns red in acid?
Litmus
How do you fit a new indicator on a 2006 Honda CR-V?
What kind of 'indicator' are you referring to? Please define more clearly and re-submit.
What kind of rocks have diamonds?
Indicator minerals for diamond include kimberlite and lamproite.
What is calculated by dividing the number of one kind of possible outcome by the total number of all possible outcomes?
The probability of that one special kind of outcome.
Can different kind of wolves get married?
Yes, it is possible.
How long do you keep the cake in the oven?
What Kind of cake is it? If I know the kind I could possible help you.
How do you find the pH of a solution using a universal indicator?
pH indicators are usually weak acids or weak bases that change their color depending on their dissociation (protonation) state. Sometimes both forms are colored, sometimes only one. In most cases you may assume that to completely change color of bicolored indicator pH must change by 2 units. However, human eye is more sensitive to some colors than to others, thus some color changes can be perceived over wider pH range. pH indicators can be used to check pH of the solution, although they are rarely added directly. Only in acid-base titrations indicator should be added to the solution. To check pH it is much more convenient to use pH strips. It is worth of noting here that pH strips are nothing else but pieces of paper impregnated with indicator or a mixture of indicators.
What kind's religiuNS are in brazil?
Every possible kind, though the majority of people are Catholic or evangelistic Christians.
Would the same results be possible with different kind of seeds?
no
What is preposition used with kind?
He is as kind as a saint.Please be as kind as possible with the customers.His mood changes from kind and caring to rage without warning.This infant is being adopted by kind, caring parents.
