When an acid is gradually added to a basic solution containing phenolphthalein, the solution will change from pink to colorless as the neutralization reaction takes place. Another important aspect of acid-base neutralization reactions is the concept of equivalence point. The equivalence point is ...
Understand what acid-base indicators are, how they work to determine if a solution is acidic or basic, and see the examples. Related to this QuestionWhy is phenolphthalein an appropriate indicator for a weak acid-strong base titration? Why is phenolphthalein used in a titration experiment? Why...
Taking an antacid for acid reflux, heartburn or indigestion helps to relieve the burning sensations and the pain. An antacid, containing a base like calcium carbonate or magnesium hydroxide, relieves pain by neutralizing stomach acid. A reaction between an acid and a base is called neutralization....
(e)Phenolphthalein is an indicator and is represented by the formul a HIn.Phenolphthalein, HIn, is a weak acid.HInH++ In The K value for phenolphthalein is 5.0 × 10-10moldm-3 at 298 K. This indicator changes colour at a pH of approximately 8.8.[In-]Calculate the ratio n at pH ...
Phenolphthalein is colorless in an acidic solution. In an acidic solution, the benzoid form of phenolphthalein exists. In the benzoid form of...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tou...
Eriochrome Black Tis a complexometric indicator that is used in complexometric titrations, e.g. in the water hardness determination process. It is an azo dye. What is the use of phenolphthalein? Phenolphthalein is often used asan indicator in acid–base titrations. For this application, it turns...
To determine the color of the China Rose Indicator when added to an acid, we can follow these steps:1. Understanding China Rose Indicator: - China Rose Indicator is derived from the petals of the China Rose flower. When the
To obtain phenol from aniline, we can follow a series of chemical reactions involving diazotization and hydrolysis. Here’s a step-by-step breakdown of the process:Step 1: Diazotization 1. React aniline with sodium nitr
acid and lactone ring content of from 0.02 to 0.15 mol%, and having a melting point falling between 160 DEG C and 230 DEG C, and contain from 0.0003 to 1 part by weight, relative to 100 parts by weight of the polyvinyl alcohol therein and in terms of sodium ion, of an alkali metal...
For example, "universal indicator" contains thymol blue, methyl red, bromothymol blue, thymol blue, and phenolphthalein. It covers a pH range from less than 3 (red) to greater than 11 (violet). Intermediate colors include orange/yellow (pH 3 to 6), green (pH 7 or neutral), and blue ...