what does pH have to do with hydrogen ions?

Question

i have to write a lab on pH and I don't know how hydrogen ions affect pH, do they carry kinetic energy better thus making the substance more acidic or what else is it that affects the solutions acidity

Answer 1

pH is a measure of the concentration of hydrogen ions in solution -- i.e. - the acidity of the solution. The lower the value of pH, the more acidic the solution is.

pH is calculated in the following manner:

pH = -log [H+] (the log is base 10)

so, a neutral solution of pure water has a hydronium ion concentration ( [H+] )of 10-7, so:

pH = -log (10^-7) = 7

An acidic solution with [H+] = 10^-3 would have a pH of 3; an alkaline solution with [H+] = 10^-10 ould have a pH of 10.

Also remember that since the value of Kw = 10^-14, that;

pH + pOH = 14!

Easy stuff!

Now, hydrogen ions make an acid acidic -- not because they carry more kinetic energy, but because they are extremely reactive. That's why acids attack metals and other materials -- they are looking for an electron to fill their empty valence shell to become electrically neutral. When you put a bar of metal into an acid solution, the acid immediately starts oxidizing the metal, generating metal ions in solution, and releasing hydrogen gas (H2). The net reaction might be something like:

2 H+ + Zn (s) =====> Zn+2 + H2 (g)

Answer 2

The releationship between the two is neither direct or inverse it truly is pH does no longer equivalent a million/[H3O+] or [H3O+]*a The pH of a substance is the detrimental log of the concentration of hydronium (H3O+) ions that exist interior the answer. So organic water has been stumbled directly to have a hydronium concentration of a million.0*10^-7 and so the pH is stumbled on as follows. pH = -log([H3O+]) pH = -log(a million.0*10^-7) pH = -(-7) pH = 7 And so the pH of organic water is 7 or impartial