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Why do you titrate strong base against weak acid using phenolphthalein?
Wiki User
∙ 11y ago
A strong base and weak acid gives a basic salt. Therefore the end point of a titration between a strong base and a weak base has a pH value above than 7.0 at 298K. As the end point of phenolphthalein is around 9.1 (~can vary between the values of 8.1 to 10.1) at this temperature, it would give more accurate results.
Wiki User
∙ 11y ago
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Standardization of hydrochloric acid with borax?
Dissolve approximately 0.25g of Borax in distilled water. Titrate against hydrochloric acid using methyl orange indicator. At end-point, solution should be almost colourless against a white background.
What is the purpose for using phenolphthalein for an acid base titration?
It's the colour indicator you watch for during the titration.
Why is a back titration sometimes used for an analysis rather than a direct titration?
Back titrations are used when a reaction occurring in the conical flask can not be detected using an indicator such as phenolphthalein. So, after this titration has been performed, the 'excess' is then titrated with something that can be detected more easily using phenolphthalein etc.
When phenolphthalein is added to a basic solution what happens?
That really depends on the strength of the acid, the antacid, and how much of each are present in a mixture. Phenolphthalein is a pink in the presence of higher strength bases (pH > 8.2), orange in the presence of very strong acids (pH < 0), and colorless between pH 0 and 8.2, as well as above 12. If your acid and antacid is combined in a single mixture, the color will depend on the ratio of acid and antacid, taking into account the strength of both the acid and the antacid. If you have significantly more antacid than acid, chances are that it will be pink (unless you're using a strong base like sodium hydroxide for your antacid, at which point it will be colorless), while if you have more acid than antacid, it'll be colorless (unless your acid is a superacid such as fluoroantimonic acid, which there's no reason why you would be using it).
What is the colour change in the titration of NaOH and C2H2O4 if using phenolphthalein as an indicator?
Adding NaOH-sol'n to oxalic acid, C2H2O4, the colour (from colorless) has to become purple-blue at pH 8 to 10.
Standardization of hydrochloric acid with borax?
Dissolve approximately 0.25g of Borax in distilled water. Titrate against hydrochloric acid using methyl orange indicator. At end-point, solution should be almost colourless against a white background.
How do you turn water into wine using phenolphthalein?
See the Related Link for instructions.
Is solution x safe to drink with phenolphthalein?
what would happen if scientists were testing to see if a substance was safe to drink and used phenolphthalein as an indicator and what would happen if the test was done using methyl orange
What is the purpose for using phenolphthalein for an acid base titration?
It's the colour indicator you watch for during the titration.
Why is a back titration sometimes used for an analysis rather than a direct titration?
Back titrations are used when a reaction occurring in the conical flask can not be detected using an indicator such as phenolphthalein. So, after this titration has been performed, the 'excess' is then titrated with something that can be detected more easily using phenolphthalein etc.
Discussion for acid-base titration experiment?
discussion for the titration of NaOH and HNO3 by using phenolphthalein & methyl orange indicators
How can you test for acids and bases?
by using phenolphthalein,litmus paper (red and blue),cabbage,tea,and PH paper or PH meter
When phenolphthalein is added to a basic solution what happens?
That really depends on the strength of the acid, the antacid, and how much of each are present in a mixture. Phenolphthalein is a pink in the presence of higher strength bases (pH > 8.2), orange in the presence of very strong acids (pH < 0), and colorless between pH 0 and 8.2, as well as above 12. If your acid and antacid is combined in a single mixture, the color will depend on the ratio of acid and antacid, taking into account the strength of both the acid and the antacid. If you have significantly more antacid than acid, chances are that it will be pink (unless you're using a strong base like sodium hydroxide for your antacid, at which point it will be colorless), while if you have more acid than antacid, it'll be colorless (unless your acid is a superacid such as fluoroantimonic acid, which there's no reason why you would be using it).
What is strong against a glameow?
As long as Glameow doesn't have any psychic or Ghost attacks, You'd be best using a fighting style pokemen against it for super-effective damage.
What rhetorical device were the declaration's signers using when they used strong emotional words to describe the grievances against the king?
pathos
How acid and alkali can be differentiated by using phenolphthaleine?
Phenolphtahlein in acid should be colorless, and in base it should be pink.
What is the colour change in the titration of NaOH and C2H2O4 if using phenolphthalein as an indicator?
Adding NaOH-sol'n to oxalic acid, C2H2O4, the colour (from colorless) has to become purple-blue at pH 8 to 10.
