I usually find vinegar is a good replacement for vinegar...
no salt
Since Halite is otherwise known as rock salt, the question for an antonym is confusing. Is one looking for the opposite of salt, or the opposite of rock? I don't think there is a meaningful answer.
A compound
The salt temporarly alkalinizes the mouth, which is the opposite environment bacteria likes to live in. The salt also helps your injured gums heal.
In fact the level of salt in water causes the opposite. The higher the salt content, the less likely you are to sink. The Dead sea is my example for this.
Salt waters climate is the opposite of the fresh water's climate,so it's climate is salty.
They are the opposite of commodities. Salt is a commodity. It is sold only on price. If you buy a trainload of salt and put it in bags with "Morton Salt" written on them, it has become a branded good and you can sell it on the advantages of...well, whatever advantage Morton salt has over store-brand salt.
They react to form an ionic salt
Yes, because when salt is put into water, they can also act like magnets. Attaching to opposite particles. The salt molecules also push down the water molecules so the water molecules have to get enough power to evaporate. Which makes plain water evaporate faster.
Depends on what type of plant you are growing. I suppose you have to know if it thrives in salt water or not. Just ask the question, is it grown on land or in the ocean? For most household plants the salt in it will actually dehydrate the cells and it'll do the opposite of what you want it to do. But plants grown underwater in oceans need salt water.
Nothing. The salt you add to pasta adds flavor to the pasta. You'd still have pasta that looks and tastes exactly like pasta, just with less salt in it. There is a misconception that salt reduces the boiling point of water, when in fact the opposite is true.
Table salt or "Sodium Chloride", forms a crystalline lattice when sodium and chloride ions are bound in the solid by ionic bonds due to electrostatic attraction arising from the opposite charges of the ions. Each ion is surrounded by 6 other ions of the opposite type, i.e. the nearest neighbour number is 6.add. If you examine some table salt grains under a microscope you'll find several that are the shape of cubes, or roughly so.
Table salt or "Sodium Chloride", forms a crystalline lattice when sodium and chloride ions are bound in the solid by ionic bonds due to electrostatic attraction arising from the opposite charges of the ions. Each ion is surrounded by 6 other ions of the opposite type, i.e. the nearest neighbour number is 6.add. If you examine some table salt grains under a microscope you'll find several that are the shape of cubes, or roughly so.