Why does water have neutral pH?

Answer 1

when CO2 dissolve in sea water it is actually present in several different forms. carbonic acid is only one of these. in ocean some carbonic acid rapidly brakes down to H+, CO32- so sea water is not acidic because of dissolve of large amount of CO2.

Answer 2

Oftentimes acids are measured by an increase in H+ in a solution (a pH < 7.0).

Likewise, bases are measured by an increase in OH- in a solution (a pH >7.0).

Water is a balance of H+ and OH-, or HOH, or H2O.

Sometimes water will absorb gases like CO2 which will lower the pH (make it more acidic).

Also - note that a neutral pH is DEFINED in terms of the equilibrium constant of pure water. It's got a "neutral pH" because that's the value that was defined for "neutral".

Answer 3

It has the same number of hydroxide ions and hydronium ions.

Answer 4

sea water is not neutral it is a tiny bit acidic and it should be 6 on the pH scale.

However, that means that there is no coral, no limestone, no shellfish; not anywhere, not ever.

Answer 5

The concentration of H+ ions is exactly the same as of OH- ions (both 1.0*10^-7), so there is no excess of respectively acidity or alkalinity. That is what is called: neutrality.

Answer 6

If it is sodium chloride NaCl: Na+ and Cl- are both neutral ions, they do not (and cannot) donate or gain protons from or to water.