Yes sodium chloride may be used in water softeners.
It isn't an element, it is the salt sodium chloride a compound.
Likely you can. While technically it just used to regenerate an ion exchange resin, it still has to be pure enough to not add any toxins to the water. Bear in mind that ion-exchange water softeners may use either sodium chloride or potassium chloride. Neither salt is particularly toxic, but potassium chloride tastes pretty bad.
Sodium chloride doesn't react with water; in water NaCl is dissolved and dissociated in ions.Sodium chloride doesn't react with water; sodium chloride is dissolved and dissociated in water.
all depends on how much water you put in and how much sodium chloride you used
The crystallization/recrystallization of sodium chloride from water solutions is frequently used.
Because metallic sodium reacts quickly and violently with water.
No, because it's not the chloride part that's responsible for the hardness, it's the calcium. Sodium chloride is actually used in water softeners, so it's not a great choice if you're looking to increase the hardness. You could use calcium hydroxide, though this will also make the pool more alkaline which may not be ideal.
Evaporating the water sodium chloride is obtained.
Salted water is not used for irrigation in agriculture. Sodium chloride irrigation can be used for the nose disinfection etc.
Sodium chloride is a crystalline solid but can be dissolved in water to form a solution.
Water solution of sodium chloride is an electrolyte.
Sodium chloride is often used as a household salt.