Ionization of acids and bases

Chemistry and homework help forum.

Organic Chemistry, Analytical Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Theoretical Chemistry, High School Chemistry, Colledge Chemistry and University Chemistry Forum.

Share your chemistry ideas, discuss chemical problems, ask for help with scientific chemistry questions, inspire others by your chemistry vision!

Please feel free to start a scientific chemistry discussion here!

Discuss chemistry homework problems with experts!

Ask for help with chemical questions and help others with your chemistry knowledge!

Moderators: expert, ChenBeier, Xen

Post Reply
User avatar
Dhamnekar Winod
Full Member
Full Member
Posts: 16
Joined: Sat Nov 21, 2020 10:14 am
Location: Mumbai[Bombay],Maharashtra State,India

Ionization of acids and bases

Post by Dhamnekar Winod »

Certain water soluble organic compounds like phenolphthalein and bromothymol blue behave as weak acids and exhibit different colours in their acid (HIn) and conjugate base \((In^-)\) forms.
\(HIn(aq)_{\text{acid Indicator Colour A}} + H_2O(l) \rightleftharpoons H_3O^+(aq)_{\text{Conjugate acid}} + In^–(aq)_{\text{Conjugate base Colour B}}\)

Such compounds are useful as indicators in acid-base titrations, and finding out \(H^+\)ion.

In the aforesaid chemical equation, what is the meaning of In?
Any science consists of the following process. 1) See 2)Hear 3)Smell,if needed 4)Taste, if needed 5)Think 6)Understand 7)Inference 8)Take decision [Believe or disbelieve, useful or useless, true or false, cause or effect, any other criteria]
User avatar
Distinguished Member
Distinguished Member
Posts: 493
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

Re: Ionization of acids and bases

Post by ChenBeier »

In means Indicator. In- is the anion of indicator.
Post Reply