explain why water has concave and mercury is convex in glass tubes,pipettes etc
Answers
Answer:
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Explanation:
Answer: When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.
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Answer:
Water has a concave and mercury is convex in glass tubes and pipettes due to intermolecular forces.
Explanation:
In glass tubes, pipettes, and other similar objects, water displays a concave meniscus while mercury displays a convex meniscus due to the intermolecular forces between the molecules of the liquid and the container.
Polarity refers to the fact that a molecule of water has a small positive charge on one end and has a slight negative charge on the other. Water is more attracted to glass than it is to itself when it comes into touch with a glass surface because the negative end of the water molecule is drawn to the positive charge of the glass molecules. As a consequence, a concave meniscus is formed on the water's surface close to the glass.
Mercury molecules, on the other hand, are not polar and do not strongly draw glass molecules. So, mercury has a low degree of reactivity and does not form powerful chemical bonds with other substances. Mercury's surface tension causes it to pull away from the surface of glass when it comes into touch with it, forming a convex meniscus.
Therefore, the polarity and reactivity of the liquid molecules themselves, as well as the intermolecular forces between the liquid molecules and the molecules of the container, are responsible for the distinct behaviours of water and mercury in glass tubes and pipettes.
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