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The two have different densities which allows the oil to sit on top of the vinegar.
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∙ 14y ago
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Why does an oil and vinegar dressing have two layers?
As these liquids are immiscible
What physical property is used to separate crude oil into fractions?
Difference in the boiling points among different byproducts of crude oil is used to separate out each component from a mixture. Fractional distillation is used to carry out this process. This method can also be used to purify water and acetone from a mixture.
Why machines are frequently oiled or greased?
Metal does not slide well against other metal. A layer of grease or oil is added to separate the layers of metal.
Which oil was used in oil drop experiment?
clock oil
What are immiscible substances?
Immiscible means incapable of mixing, but you'd (you might) have to ask further incase there is a special solution called 'immiscible solution' of which its inability to mix is only one aspect of it.
Is oil and vinegar salad dressing a heterogeneous mixture homogeneous mixture or pure substance?
Nope. Its not a homogenous mixture. Homogenous mixtures are uniform throughout, and the parts do not separate from each other. Have you ever looked at Italian dressing (which has vinega and oil in it) after you let it sit in your fridge for any length of time? You can see the oil separate from the rest of the dressing.
Why doesn't a french dressing separate unlike oil and vinegar?
why doesn't French salad dressing separate
Why would Italian dressing be separated into two layers after a while?
Italian dressing separates because it is basically a mixture of oil, vinegar and water with flavorings. Oil does not mix easily with water and vinegar; after a few moments, the oil always rises to the top. This is why you must shake most kinds of dressing before pouring them onto food. ............................................. Italian dressing would separate in two layers because of the difference in densities. The substance on the bottom (water & vinegar) has a higher density than the substance on the top (oil.)
Is Italian salad dressing homogeneous?
No. Salad dressing is a heterogeneous mixture of oil, vinegar, and various other ingredients.
Is oil and vinegar salad dressing heterogeneous or homogeneous?
Heterogeneous materials can be separated as they are made from separate components. Oil and vinegar salad dressing is an example of heterogeous product.
What kind of mixture is Italian dressing?
it usually is a mixture of oil and vinegar.
Is Italian dressing an element?
Salad dressing is a heterogeneous mixture of oil, vinegar, and various other ingredients.
Why is it necessary to shake an oil and vinegar salad dressing before it to a salad?
It is necessary to shake an oil and vinegar salad dressing before adding it to a salad because they separate easily.
A person shakes up vinegar and oil dressing before pouring it on salads What is the chemical reason for doing this?
no. because italian dressing is a suspension of oil,vinegar
Why is it necessary to shake oil and vinegar salad dressing before adding it to salad?
Oil and vinegar dressing is a temporary emulsion. When the dressing sits for a while the oil and vinegar separate from each other. If you were to put this on the salad it would taste pretty disgusting because it would be entirely oil. So to avoid this, you shake the dressing and then add it to the salad so that the oil and vinegar is combined and it creates a good flavour.
Is mixing oil and vinegar into salad dressing a chemical reaction?
yes because salad dressing is a suspension of vinegar that will separate into layers if left undisturbed.
Is Italian salad dressing heterogeneous?
Heterogenous. If left alone for a while the oil will separate from the vinegar and some of the spices will either float or sink to the bottom. Homogenous means the substance is the same throughout, always.
