Which ions are most abundant in water?

Answer 1

Hello, Diana,

Is this pure, distilled water? Or something from a Flint, MI water tap?

If it is pure water, the water molecules are in equilibrium:

H2O ↔ H⁺ + OH^-

The two ions are equal in concentration to each other. Their equilibrium coefficient is1x10^-14. At equilibrium, both ions have a concentration of 1 x 10^-7. pH is the negative log of the hydrogen ion concentration.

[H⁺] = 1x10^-7

pH = 7

Bob