Phenolphthalein is an indicator that changes colour to pink/purple between pH 8 to 10, however, neutralization occurs when pH = 7. Why can phenolphthalein still be used as the indicator during a stron What is the color of phenolphthalein in a basic solution?
What is the pH range in which phenolphthalein is colourless ? 01:47 Name the insoluble salts that can be prepared by direct combination ? 01:35 What are the pH values of the following solutions at 25^(@)C ? (i) 0... 02:30 The formula of the basic salt formed by treating calcium...
What colour do the following indicators turn when added to an acid? Litmus solution View Solution What colours do the following indicators turn when added to an acid (such as hydrochloric acid)? (a). Litmus (b). Methyl orange View Solution ...
what is the original color of Phenolphthalein solution? pink or colourless?So you have a known amount of a liquid, and you add a couple of drops of phenol red indicator. The solution is pink in color. What material do you use to titrate this? a. A ...
In what pH range do methyl orange and phenolphthalein change color? The colours of the acid and base forms of the indicator Bromo cresol green are yellow and blue, respectively, and its pK_a is 4.6. (a) What colour would be expected for the indicato...
Which of the following is weak acid indicator? Phenolphthaleinis a colourless, weak acid which dissociates in water forming pink anions. Under acidic conditions, the equilibrium is to the left,and the concentration of the anions is too low for the pink colour to be observed. ...
The scientific study of matter's characteristics and behaviour is known as chemistry.andare different from the normal vocabulary. It is a branch of natural science that examines the building blocks of matter, including the atoms, molecules, and ions that make up compounds and their composition, ...
What is a neutral solution - A solution which is neither acidic nor basic is called a neutral solution. Its pH value is 7. It does not change the colour of the indicator.A solution is defined as neutral if the concentration of hydrogen ions is the same a
A compound that changes colour at a specific pH value or in the presence of a particular substance, and can be used to monitor acidity, alkalinity, or the progress of a reaction The remaining alkali is titrated against standard acid using phenolphthalein as indicator Measure A device used for ...
There exist many classical methods of checking for the presence or absence of a particular compound in a given analyte. One such example is the acid test for gold. Another example of a classical method for qualitative analysis is the Kastle-Meyer test which employsphenolphthaleinas an indicator ...