Ph in salt water?

Answer 1

Actually pH depends on the salt concentration.
A pH-meter measures the activity or effective concentration of H+. It is symbolised as aH+ or {H+}.

Its relation with concentration is {H+} = γ * [H+]
where γ is a coefficient dependent on ionic strength (salt content), takes values between 0 and 1 and becomes 1 for infinite dilution.

The effective concentration is lower than the real because of the interactions between the ions in the solution and as you can guess from its name it is the one that determines the physical-chemical properties of the solution.
You can check on wikipedia "ionic strength" if you want.

By the way ionic strength also affects the pH of buffers not only of simple solutions...

From then on it depends on the nature of the salt. If we are talking about water+salt and it is the salt of a strong acid with a strong base, like NaCl, then the salt doesn't contribute a lot and the solution will be neutral. The contribution of ionic strength will depend on the concentration of the salt, but still don't expect dramatic changes if any at all since we have only the self-dissociation of water to both H+ and OH- (for sure much lower than a pH unit but I don't know if it will be above or below seven e.g. a wild speculation could be 6.98 or 7.02. I guess it would depend on the ionic strength of the buffers you used to calibrate your pH-meter)

For salts that at least one part comes from a weak acid or base you will have a reaction with water and things get more complicated (the solution will be either acidic or alkaline, unless you manage to find a combination of weak acid and weak base of the same valency and strength.)

If you are asking on a simple level (high school, haven't heard about ionic strength etc) then salts of strong acids with strong bases don't affect pH.

Answer 2

If the water is slightly evaporated by employing the solar, the pH will stay an same because even regardless of the reality that there'll be a lot less water, the last salt does not substitute the pH. salt is impartial because the ions (Na and Cl) neutralize one yet another the quantity of salt continues to be an same. the water is the in basic terms difficulty it fairly is a lot less

Answer 3

if I remember right it's slightly basic so pH is slightly above 7. There are salts that can effect pH and salts are not only NaCl. THere are lots of trace elements in salt water

Answer 4

Salt water (from Sodium Chloride) is neutral. Comes from equally strong acid and base... Sodium Hydroxide and Hydrochloric acid...so pH is neutral (pH 7)

Answer 5

pH doesn't depend on salt content, but only on content of an acid or base.

Answer 6

This depends on how much salt is in it. Do not drink it! Eeew!