What Is Normal Human PH Level?

It is 7.1 inside the cell, 7.4 in the extracellular fluid.
There always must be a higher pH outside the cell, meaning the concentration of hydrogen ions outside the cell is lower. This provides a gradient for hydrogen ions to diffuse out of the cell.

7.25 to 7.35 is the normal PH for a human.  We are slightly alkaline.  The other poster was incorrect.  We have the ability to maintain homeostasis.  Some factors may drastically change our PH to a non-survivable level.  Diabetes is an example of one condition that may cause the human body to become extremely acidic if untreated.  This condition is known as diabetic ketoacidosis(DKA).

What is the approximate ph value of the film liquid covering the skins surface

7.2to 7.3

Normal human PH level is 7.28 neither more nor less,if some one have greater or less PH level he must died.

I think the question is about blood pH then it is 7.4.The blood pH is a little alkaline,it does not mean that our whole body is in alkaline state.In stomach the pH is acidic approximately 2 and in saliva pH is between 6-7.This answer will satisfactorily explain your query

7.4 Slightly alkaline, acidic is anything less than 7.