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How could you determine whether phenolphthalein remains in the residue of a titration reaction?
Wiki User
∙ 10y ago
The easiest way is to add back some of the solution you were titrating. If phenolphthalein remains, it will react with the solution and change back to purple. Incidentally, phenolphthalein will always remain in the solution of the titration reaction - it changes color depending upon the pH of the solution, but the indicator itself is not affected by the titration reaction.
Wiki User
∙ 10y ago
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How will Phenolphthalein help you test for unknown substances?
phenolphthalein turns pink when basic solution is added to it but remains colorless in case of neutral and acidic solution
What remains when water is evaporated after a neutralization reaction?
If the water is evaporated after a neutralization reaction, what remains?
Process where entropy remains the same?
It is a reversible reaction
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 happens or doesn't happen to an enzyme at the end of an enzymatic reaction?
The enzyme still remains and can be used again for another reaction.
Is there a reaction between the ammonium hydroxide inside a plastic bag when immersed in a water with phenolphthalein?
If the phenolphthalein solution turns pink, that means that the plastic bag is permeable to ammonium hydroxide. If it remains colorless, then the plastic bag is not permeable to ammonium hydroxide. If the contents of the plastic bag turn pink, then the plastic bag is permeable to phenolphthalein. If everything remains colorless, then the bag is impermeable to both ammonium hydroxide and phenolphthalein.
Phenolphthalein change color when mixed with hydrochloric acid?
No, phenolphthalein remains colourless in the presence of an acid.
How will Phenolphthalein help you test for unknown substances?
phenolphthalein turns pink when basic solution is added to it but remains colorless in case of neutral and acidic solution
What colour is phenolphthalein when soda is added?
As soda contains carbon dioxide, it's actually a dilute solution of carbonic acid, hence phenolphthalein remains colourless.
What remains when water is evaporated after a neutralization reaction?
If the water is evaporated after a neutralization reaction, what remains?
How much catalyst remains at the end of a catalysed reaction?
All the catalyst remains as it is not incorporated into the reaction products, it just speeds up the reaction time.
Process where entropy remains the same?
It is a reversible reaction
Why a catalyst is not considered a reactant or product in chemical reaction?
A catalyst is unchanged by the reaction, and remains as it was. It causes the start of the reaction, but is still there AFTER the reaction. Example- the catalytic converter on an automobile exhaust contains platinum metal. This causes a chemical reaction to take place in the exhaust gasses, but the metal remains in the converter, and is not consumed.
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.
Who would be most likely to study the remains of clay jars to determine what they once held?
Who would be most likely to examine the remains of clay jars to determine what they once held?
What net effect does a chemical reaction have on a catalyst?
None: The catalyst remains unchanged, but the catalyst also speeds up the reaction.
What happens or doesn't happen to an enzyme at the end of an enzymatic reaction?
The enzyme still remains and can be used again for another reaction.
