what is universal indicator ???
Answers
Answer:
universal indicator :-
it is the pH scale also known as universal indicator .It gives the color according to strength of acids or base according to pH scale
Answer:
pls mark brainliest.
A universal indicator is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. Although there are several commercially available universal pH indicators, most are a variation of a formula patented by Yamada in 1933.
Details of this patent can be found in Chemical Abstracts.Experiments with Yamada's universal indicator are also described in the Journal of Chemical Education.
A universal indicator is typically composed of water, propan-1-ol, phenolphthalein sodium salt, sodium hydroxide, methyl red, bromothymol blue monosodium salt, and thymol blue monosodium salt.The colours that indicate the pH of a solution, after adding a universal indicator, are:
- < 3Strong acid Red
- 3–6Weak acid Orange or yellow
- 7Neutral Green
- 8–11Weak alkali Blue
- > 11Strong alkali Violet or Indigo
The colours from yellow to red indicate an acidic solution, colours blue to violet indicate alkali and green colour indicates that a solution is neutral.