r/chemhelp • u/Feisty_Reserve8877 • 2d ago

General/High School A QUESTION[ABOUT PH AND POTENTIAL GRADIENT]

/r/chemhelp/comments/1w2qizd/a_questionabout_ph_and_potential_gradient/
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u/chem44 2d ago edited 2d ago

ISOELECTRONIC PH

Means what? I know of no such term.

Ordinary solutions (well-mixed) do not have pH gradients. The pH is uniform (except maybe at the sub-molecular scale, which we would not usually pay attention to -- pH is a macroscopic phenomenon.)

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Your post showed up twice. Please delete the one without comments. [EDIT... done]

And please turn off your CAPS. The post is almost painful to read.

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u/Feisty_Reserve8877 2d ago

SIR I AM TALKING ABOUT PI [ISOELECTRONIC POINT ]

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u/chem44 2d ago

That is the isoelectric point -- no net charge on the molecule, even with multiple acid/base groups.

Na+ ion and neon atom are isoelectronic -- have same electron configuration.

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u/Feisty_Reserve8877 2d ago

SIR CAN U PLEASE TELL ME THAT IF POTENTIAL GRADIENT OF HYDROGEN TYPE THING EVER EXIST FOR U ... WHAT WOULD IT BE ... AND DOES IT FIT ANYHOW IN WHAT I JYST SAID .........MY THAUGHT CAME FROM POTENTIAL DEFINATION FROM PHYSICS ...??????????

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u/chem44 2d ago

In an ordinary well-mixed solution, there would not be a gradient of H+ ions. The concentration would be uniform. (Again, except for the subtlety of right at an ionizable group.)

There is something called the chemical potential of a species. It is closely related to concentration. It does indeed relate to the physics meaning of potential.

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u/Feisty_Reserve8877 2d ago

can i dm u my exact doubt ?......

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u/chem44 2d ago

Post here, and anyone around can jump in. That can really help when complex terminology is involved. People may see things differently, explain things differently.

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u/chem44 2d ago

By the way...

There is a lab procedure of doing electrophoresis in a pH gradient. Each species stops at its isoelectric point.

Look up isoelectric focusing.