Some important applications of sodium chloride - seasoning for foods
- preservative for foods
- preparation of sodium, chlorine, sodium hydroxide, hydrogen
- roads deicing
- soaps fabrication
- salts baths
- isotonic solutions - sodium is indispensable for life
etc.
"salt of the earth" means a valuable person. You'd never know it from modern society, but salt used to be a very valuable commodity.
It was a long time ago in africa because it was used to preserve food, make it more tasty, and it replaced salt lost when they sweat. Salt being more valuable is an opinion though, but for west africans, salt seemed more valuable
i think salt, because in 1600 there were lots of trading going on and salt was valuable.
In the middle ages salt was very rare and valuable, so a person "worth their weight" was a person who was needed and valuable.
salt
salt
SALT.
Because without salt the life of human beings and many animals is impossible.
gold and salt .
Salt and gold.
Salt
salt, or gold 8)