2007-11-29 13:30:18 · 3 answers · asked by snailtrail 1 in Science & Mathematics ➔ Chemistry
a water softener removes calcium and magnesium from the water to make it soft---when the media in the softener is depleted it is recharged by soaking it in salt water so the calcium and magnesium ions can be exchanged for the sodium ions in the salt allowing it to cintinue removing calcium and magnesium. during softening the calcium and magnesium are exchanged for sodium resulting in "zero" harness water.
2007-11-29 13:52:56 · answer #1 · answered by retwwwman 2 · 0⤊ 0⤋
Water softeners contain ion-exchange resins - the cation resin is in the sodium form and the anion resin is in the chloride form. Minerals in water are exchanged for sodium & chloride ions. Running a salt solution through the column regenerates it by displacing the absorbed mineral ions with sodium& chloride.
Deionisers (give pure water) on the other hand contain a mix of cation resin in the H form & anion resin in the OH form and they can't be regenerated without first separating the resins.
2007-11-29 21:48:50 · answer #2 · answered by Aurium 6 · 0⤊ 0⤋
not rock salt pure sale
2007-11-29 21:37:10 · answer #3 · answered by Michael M 7 · 0⤊ 0⤋