Oil and vinegar have antiseptic qualities which help preserve food. The oil submerses the food from any airborne contaminants, while the vinegar sterilizes the food's environment.
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You mean canning or pickling? When you pickle something, you normally put vinegar in it. Some bacteria don't prefer to live in a slightly acidic environment (vinegar is a little acidic). So the vinegar will deter SOME bacteria from growing, which may prevent spoilage. When you can or pickle something, make sure to heat it very hot 165 degrees then close it TIGHT, immediately after you put it in the jar. This will prevent bacteria from living in the jar and spoiling the food! I would say that securely jaring and properly heating the food is the main reason why jarred or canned food items don't spoil.
Oil and vinegar is a heterogeneous mixture.
oil and vinegar
No. Oil will float on vinegar as vinegar has the same density as water.
vinegar is more dense
Mayo (mayonnaise) is basically an oil and vinegar salad dressing with eggs added to it. Since the oil and vinegar mixture will separate into its components, eggs are added to it as an emulsifier that will bind to the oil and vinegar and prevent it from separating. You may be able to make something that looks like and has the consistency of mayonnaise with mineral oil but it will not be mayonnaise. The oil used to make mayonnaise is a vegetable oil or otherwise edible fat that is a food nutrient that is digested and absorbed by the body. Mineral oil is not an edible oil. Mineral oil will mostly go right through the digestive system without being absorbed and is excreted. A common use of mineral oil is as an enema.
Vinegar is a heavier substance than Olive Oil so the Vinegar goes to the bottom and the Olive Oil stays up top
Vinegar oil bottles come two types. One comes with two bottles, one is oil and one is vinegar. The second type is the combined mixture of oil and vinegar which is used for gourmet cooking.
Oil has a lower density than vinegar. When oil and vinegar are mixed, the oil rises, or floats to the top.
vinegar!
When you purchase balsamic vinegar, you do not get the oil in the vinegar. However, it is possible to purchase a pine nut oil and balsamic vinegar salad dressing.
Vinegar oil bottles come two types. One comes with two bottles, one is oil and one is vinegar. The second type is the combined mixture of oil and vinegar which is used for gourmet cooking.