ACID, BASE & INDICATOR : Difference between Acid & Base ?

UTPAL SHARMA

Hello, as per the title we need to discuss acid, base & indicator. The first question arising how we may define it? So let's discuss it -

ACID:-

A substance whose taste is sour (khatta) & chemical nature is acidic, such as lemon, orange, curd etc.

BASE:-

A substance whose taste is bitter (kadwa) & chemical nature is basic, when we rub it between our finger we feel soapy. Ex. - baking soda etc.

INDICATOR:-

The substance which is used to identify acid, base & neutral solution. In short, we may separate acid & base with its help. Example:- Litmus, Turmeric (Haldi), & China rose.


How does the indicator helps to identify Acid & Base?

1) How litmus works -

  • Litmus is available in form of paper strip & in solution.
  • After contact between litmus strip & any solution ( test sample ) if litmus strip turns in red colour then the solution is acid.
  • If it turns in blue color then the solution is base.
  • If there is no change then the solution is neutral.
ACID, BASE & INDICATOR : Difference between Acid & Base ?

2) How turmeric works -

  • It is used as a paper strip.
  • After contact between turmeric strip & solution ( test sample ) if strip turns in red color then the solution is base.

ACID, BASE & INDICATOR : Difference between Acid & Base ?

3) How China rose is used -

  • It is used as a solution.
  • After contact between china rose solution & solution ( test sample ) if it turns in a dark pink color then the solution is acid.
  • If the solution turns in green color then it is base.

ACID, BASE & INDICATOR : Difference between Acid & Base ?


The basic difference between ACID & BASE


S.No.
BASIS
ACID
BASE
1.
Taste
Sour (khatta)
Bitter (kadwa)
2.
Chemical nature
Acidic
Basic
3.
Contact with a litmus strip
It turns in red color
It turns in blue color
4.
Contact with China rose
It turns in dark pink color
It turns in green colour
5.
Example
Lemon, Orange etc.
Baking soda, etc.

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