Question

What color does universal indicator go in a liquid with a $pH$ of $9$?

Answer 1

Hint:We define \[pH\] indicators are weak acids that exist as natural dyes and indicate the concentration of \[{H^ + }\] ions during a solution via color change. A \[pH\] value is decided from the negative logarithm of this concentration and is employed to point the acidic, basic, or neutral character of the substance you're testing.

Complete step by step answer:
We must remember that a universal indicator may be a pH indicator made from a solution of several compounds that exhibits several smooth color changes over a good range \[pH\] values to point the acidity or alkalinity of solutions. A universal indicator is usually composed of water,\[{\text{ }}1 - Propanol,\] phenolphthalein sodium salt, caustic soda, methyl red, bromothymol blue monosodium salt, and thymol blue monosodium salt. The colour that indicate the pH of a solution, after adding a universal indicator are,
 

Universal indicator may be a brown colored solution containing a mix of indicators, which will be added to any substance to work out its \[pH\]. It changes color in different pH environments. At the \[pH\] range of \[8 - 11\] , the color is blue.


Note:
Type of universal indicator:
A universal indicator is collectively a mix of indicators which show a color change during a solution, which interprets how acidic or basic a solution is. A universal indicator is often in paper form or present during a sort of a solution.
-Paper form: It’s a strip of colored paper which changes color to red if the answer is acidic and to blue, if the answer is basic. The strips are often placed directly onto a surface of a wet substance or few drops of the answer are often dropped onto the universal indicator using dropping equipment. If the test solution is of a dark color, it's preferable to use a paper universal indicator.
-Solution: The most components of a universal indicator, within the sort of a solution, are thymol blue, methyl red, bromothymol blue, and phenolphthalein. This mixture is vital because each component loses or gains protons depending upon the acidity or alkalinity of the answer being tested. It’s beneficial to use this sort of universal indicator during a colorless solution. This may increase the accuracy level of indication.