Volume-weighted blend of any number of waters.
Ions are conservative on mixing, so this is a straight weighted mean. pH isn't conservative (it's the log of an activity), so it's dropped from the result. Averaging it would give a plausible-looking wrong number.
Volume-weighted blend of any number of waters.
Ions are conservative on mixing, so this is a straight weighted mean. pH isn't conservative (it's the log of an activity), so it's dropped from the result. Averaging it would give a plausible-looking wrong number.