BIOCHEMISTRY
PROPERTIES OF WATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The density of the water is decreased by the addition of dish detergent, which changes the behavior of the paper clip.
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The water’s surface tension is decreased by the addition of dish detergent, because the detergent molecules interrupt hydrogen bonding between water molecules.
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The water’s cohesive properties are increased by the addition of dish detergent, because the detergent molecules enhance hydrogen bonding between water molecules.
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Detailed explanation-1: -What explains these observations? The density of the water is decreased by the addition of dish detergent, which changes the behavior of the paper clip. The water’s surface tension is decreased by the addition of dish detergent, because the detergent molecules interrupt hydrogen bonding between water molecules.
Detailed explanation-2: -The high surface tension helps the paper clip-with much higher density-float on the water. The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.
Detailed explanation-3: -The metal that makes up the paper clip is denser than the water. In addition, because its metal structure is so thin, the amount of water the paper clip displaces is minimal. Thus, the paper clip has a greater weight than the water it displaces.
Detailed explanation-4: -When you initially drop the paper clip into the bowl of water, it sinks, as the paperclip is too dense.
Detailed explanation-5: -The paperclip is less likely to float in the water with detergent because the detergent acts as a surfactant-a material that reduces the surface tension of the liquid it is dissolved in.