what are indicators? how can you test presence of acid and base by using
1)litmus solution
2)methyl orange
3) phenolphthalein
Answers
Answer:
Indicators are substances whose solutions change color due to changes in pH. ... They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.
Answer:
An indicator is a dye that changes colour when it is put into an acid or base . Indicators are substances which indicate the acidic or basic nature of the solution by the colour change .
Explanation:
Types of indicators :-
1)Litmus
Litmus solution is a purple dye .
Litmus is of two types - Blue or Red
An acidic solution turns blue litmus paper to red
A basic solution turns red litmus to blue .
2) Methyl Orange
It is originally orange in colour.
It turns into red with acids.
It turns into yellow with base.
3) Phenolphthalein
It is a colourless liquid .
It remains colourless with acid.
It turns into pink with a base .
Hope this answer will help you out .