Table of Contents
- 1 What is the endpoint?
- 2 Why is phenolphthalein pink?
- 3 How many types of titration are there?
- 4 What is the point of titration?
- 5 Why did the solution turn to light pink at the end of titration?
- 6 Is neutralization same as equivalence point?
- 7 What is a Neutralisation reaction?
- 8 How do you find equivalence?
- 9 Why is pH at equivalence point not 7?
- 10 What is the phenolphthalein indicator?
- 11 What color is the protonated form of phenolphthalein?
What is the endpoint?
An endpoint is a remote computing device that communicates back and forth with a network to which is it connected. Examples of endpoints include: Desktops. Laptops.
Why is phenolphthalein pink?
Phenolphthalein (HIn) is weakly acidic in nature. And in aqueous solution, it dissociates into and ions. The pink colour of the solution is due to the concentration of ions in the solution. Under acidic conditions, the concentration of in the solution is very low and concentration of is high, hence it is colourless.
How many types of titration are there?
This process is called titration and the solution in the buret is called the titrant. Type of Titrations Classified into four types based on type of reaction involved; 1.Acid-base titrations 2.Complexometric titrations 3.Redox titrations4.Precipitation titrations. 3. …
What is the point of titration?
The concentration of a basic solution can be determined by titrating it with a volume of a standard acid solution (of known concentration) required to neutralize it. The purpose of the titration is the detection of the equivalence point, the point at which chemically equivalent amounts of the reactants have been mixed.
Why did the solution turn to light pink at the end of titration?
The indicator changes to pink because the phenolphthalein is ionized in basic solution. The base strips H+ ions from the acid, and near the end of the titration, it starts pulling H+ ions from the phenolphthalein. … It is used in titrations because it's easy to tell when the H+ from the acid has been neutralized.
Is neutralization same as equivalence point?
Acid-base titrations depend on the neutralization between an acid and a base when mixed in solution. The endpoint and the equivalence point are not exactly the same: the equivalence point is determined by the stoichiometry of the reaction, while the endpoint is just the color change from the indicator.
What is a Neutralisation reaction?
A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7.
How do you find equivalence?
To convert from moles to equivalents, simply multiply the number of moles by the number of equivalents to moles. To convert from equivalents to moles, divide the number of equivalents by the number of equivalents per mole.
Why is pH at equivalence point not 7?
If you titrate a weak acid (e.g. CH3COOH) with a strong base (e.g. NaOH) the salt produced (e.g. CH3COONa) is basic and the conjugate base from the salt (CH3COO-) reacts with water. Therefore the solution produced is weakly alkaline and the pH of the equivalence point will be greater than 7.
What is the phenolphthalein indicator?
Phenolphthalein. chemical compound. Phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution's pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0.
What color is the protonated form of phenolphthalein?
In the case of phenolphthalein, the protonated form is colorless, while the deprotonated form is pink.