Soluble and insoluble ?
Use your understanding of the term soluble and insoluble to explain why you must shake a bottle of salad dressing made with grease and vinegar before you use it.
Answers:
Vinegar (acetic acid in water) is a polar substance while grease is non-polar. Polar and non-polar molecules don't like to interact with one another due to less favorable interactions. Rather, polar molecules resembling to interact with themselves and non-polar molecules like to interact with themselves. Hence why grease and vinegar form layers (at equilibrium). However, if you shake them, you will force the differing molecules to interact with respectively other.
Just remember that birds of a feather flock together. Substances with charges like to hang up out with other substances with charges. Vinegar is a mixture of acetic acid and dampen. Being an acid Vinegar is charged-or is polar. Oils are long chains of hydrogenated carbon groups of fatty acids attached to glycerol or some other molecule. Oils are non-polar and therefore not charged. Because of the differences in their charges and consequently their lack of attraction for each other, oil and vinegar don't approaching to mix. Oil and water are even less attracted to each other. So, you can "mix" vinegar and grease by shaking for a little while. What you are doing is introducing enough energy into the bottle to temporarily break up the groups of grease and vinegar. Over time they will settle out to be with their respective brethren.
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Answers:
Vinegar (acetic acid in water) is a polar substance while grease is non-polar. Polar and non-polar molecules don't like to interact with one another due to less favorable interactions. Rather, polar molecules resembling to interact with themselves and non-polar molecules like to interact with themselves. Hence why grease and vinegar form layers (at equilibrium). However, if you shake them, you will force the differing molecules to interact with respectively other.
Just remember that birds of a feather flock together. Substances with charges like to hang up out with other substances with charges. Vinegar is a mixture of acetic acid and dampen. Being an acid Vinegar is charged-or is polar. Oils are long chains of hydrogenated carbon groups of fatty acids attached to glycerol or some other molecule. Oils are non-polar and therefore not charged. Because of the differences in their charges and consequently their lack of attraction for each other, oil and vinegar don't approaching to mix. Oil and water are even less attracted to each other. So, you can "mix" vinegar and grease by shaking for a little while. What you are doing is introducing enough energy into the bottle to temporarily break up the groups of grease and vinegar. Over time they will settle out to be with their respective brethren.
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