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
Phenolphthalein is a mild acid used in both medicine as an ingredient in laxatives and in science as a substance for testing the...
(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 ...
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 ...
What is the concentration of an HNO3 acid solution, if during titration with NaOH, 44.10 mL of the acid requires 73.80 mL of 0.3600 M NaOH to reach the equivalence point ? Why is phenolphthalein an appropriate indicator for titration?
An acid turns the indicator litmus to what color? What is the color of a phenolphthalein indicator in an acidic solution? 1. A substance with a pH of 9 is considered {Blank}. \\ 2. If red litmus paper is used to test the substance it would turn what color? \\ a. ...
1. phenolphthalein, color change at pH 8-10 2. thymol blue, color change at pH 1-3 3. bromothymol blue, color change at pH 6-8 4. methyl red, color change The pH of a 0.250 M cyanuric acid solution is 3.690. What is the value of Ka? ...
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...
of the acid by finding its relative molecular mass, M, using a titration method.FA 1 is the solution of the unknown organic acid.FA 2 is 0.100 mol dm-3 sodium hydroxide, NaOH.phenolphthalein indicator(a)Method.Fill the burette with FA 2.Pipette 25.0 cm3 of FA 1 into a conical flask....
The redox grafting method has been used for the preparation of PRM from a novel polymeric material (membrane material), phenolphthalein poly(ether sulfone), and methylacrylic acid (functional monomer) [15]. The redox system potassium persulfate (K2S2O8)-sodium sulfite (Na2SO3) was used for the...