An indicator is what kind of compound

For weak acid strong base titration the indicator used is :. The graph represents the titration curve for : a. Strong acid and strong base b. Strong acid and weak The strength of acids and bases depends on What does strong and weak acid and strong and weak base m How is the strength of acids and bases determined? OR What is meant by strong and weak acids: and we Explain that sulfuric acid is strong acid and ammonia hydro-oxide weak base.

Assertion: Conjugate acids of weak acids are very strong conjugate bases while conjugate bases of st Nitric acid is a stronge oxidizing agent. Turmeric which we use in our lifestyle for the preparation of food also can be used as the chemical indicator.

When applied on an acidic medium it changes its color into yellow. And when used as a basic solution it changes its color to brownish-red. This is the rationale thanks to which a turmeric stain on a white shirt becomes red when soap is applied thereon. This spice contains a yellow pigment. China Rose. China rose gurhal is readily available in most of the houses.

When an answer to china rose is employed with a basic solution it changes its color to green whereas when used with an acidic solution it changes its color to bright pink or magenta. From red color during an acidic environment blackberries, black currant, and black raspberries changes to blue or violet in a basic environment.

Blueberries are blue around pH 2. Cherries and their juice are red in an acidic solution, but they turn blue to purple during a basic solution. Poison Primrose. Chinese primrose has orange or blue flowers.

The orange flowers contain a mixture of pelargoniums. The blue flowers contain malvin which turns from red to purple as an answer goes from acidic to basic.

Red Purple Cabbage. Red cabbage contains a mix of pigments wont to indicate a good pH range. This is a very important formula, and its derivation is very simple. Start from the definition of the equilibrium constant K ; you can easily derive it.

In other words, when the pH is the same as p K ai , there are equal amounts of acid and base forms. When the two forms have equal concentration, the color change is most noticeable. Colors of substances make the world a wonderful place. Because of the colors and structures, flowers, plants, animals, and minerals show their unique characters. Many indicators are extracted from plants. For example, red cabbage juice and tea pigments show different colors when the pH is different.

The color of tea darkens in a basic solution, but the color becomes lighter when lemon juice is added. Red cabbage juice turns blue in a basic solution, but it shows a distinct red color in an acidic solution. Find an indicator for the titration of a 0. First, you should estimate the pH at the equivalence point, at which the solution is 0. This is a hydrolysis problem, but the following method employs the general principle of equilibrium.

Phenolphthalein in the table above has a p K ai value of 9. A parade of the color intensities is shown below:. The equivalence point is when the color changes most rapidly, not when the solution has changed color.