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marzo 27, 2020Similar questions. Mercury is an example of a liquid that forms convex menisci. why does mercury have a convex meniscus. Little drops of mercury will form into almost spheres when spilled on most surfaces (gravity will bend them out of shape). The strong cohesive forces . Mercury has very small adhesive forces with most container materials, and strong cohesive forces. If θ is 90°, then liquid meniscus will be plane. Glass molecules also happen to be polar. Because mercury still exhibits metallic bonding, even in the liquid state, and metal-metal interactions are stronger than the metal glass . A meniscus occurs because of surface tension. Meniscus occurs when the particles of the liquid stick to the sides of the glass tube. A meniscus can go up or down. . A good example of this shape of meniscus may be seen with mercury in a glass container. The shape of the water meniscus in the tube becomes concave upwards. argo parts amazon. Physics. In a science class, this liquid is usually water or some sort of aqueous solution, and the column is usually a graduated cylinder or a pipet. Answer (1 of 3): The meniscus forms when the attractive force on the liquid molecules are different between the walls of the container and the liquid. mercury to the B) The lower attraction of mercury to the glass than to itself. You should always measure light liquids at the bottom of the meniscus and . Shape of a Meniscus. For pure water and perfectly clean glass, the angle of contact is 0°. . It can be either concave or convex. Measure so that the line you are reading is even with the center of the meniscus. B) the low surface tension of mercury C) the greater attraction of mercury atoms to the glass than to each other. For Mercury it is more attracted to it self. why does mercury have a convex meniscus; By . Which best explains why the meniscus of mercury in a glass tube is convex? 94 from the horizontal to help the cars to stay in the road while moving at high. Was this answer helpful? 3. h α, \(\frac{1}{r}\) this is in the form y α \(\frac{1}{x}\) Hence when we draw graph between 'h' and 'r' we get a graph of hyperbola. C) The low surface tension of mercury. Report at a scam and speak to a recovery consultant for free. It occurs with water and a tube made of glass. It is so when one end of a glass capillary tube is immersed in a trough of mercury. A concave meniscus forms when the liquid molecules are more attracted to the container via adhesion than to each other via cohesion. For instance with glass, water has a degree of wetting where the surface of the water seeks to extend across the glass surface. When a liquid has concave meniscus, the angle of contact is acute. Alcohol does exact the same, but mercury for example, not. Medium. θ<9o°, then liquid meniscus will be concave upwards. Medium. why does mercury have a convex meniscus. E) electrostatic repulsion . Why? mercury to the B) The lower attraction of mercury to the glass than to itself. The shape of the meniscus observed when water and mercury are taken in two different capillary tubes is concave and convex respectively. If θ is obtuse, i.e. Convex. Meniscus is caused by surface tension. The cohesive forces in water and mercury are stronger than the adhesive forces to the nonpolar wax on the floor. Transcribed image text: 35. mercury The curved surface of a liquid inside a container is the meniscus. Published: June 7, 2022 Categorized as: imprisonment 5e dndbeyond . Why? The concave meniscus formed at the surface of the water column is a result of the adhesive forces being greater than the cohesive forces. Depending on the direction of pressure . A small drop of liquid placed on a uniform, perfectly flat, solid surface, will not always spread completely over this surface, but the edge of the drop may make an angle 6 with the . However in case of colored liquids observing this phase boundary is not possible, hence only upper meniscus is considered.What is upper meniscus and lower meniscus? In case of colorless liquid it is easy to observe the phase boundary, wether it is convex or concave hence in colorless liquids upper or lower meniscus may be considered. Science Chemistry Q&A Library Which best explains why the meniscus of mercury in a glass tube is convex? C) The low surface tension of mercury. A meniscus is the curved surface at the top of a column of liquid. B) The lower attraction of mercury to the glass than to itself C) The low surface tension of mercury D) The high density of Mercury compared to water. Water is an example of a fluid that forms concave menisci. As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. Weak adhesive forces result in spherical drops. Similar questions. (ii) in case of mercury . A convex meniscus occurs when the liquid particles are more attracted to each other than . A) The greater. Hence the liquid in the trough is . A meniscus occurs because of surface tension. OF_ (s) O CHCI (3) O NH3 (s) O LiCl (s) In a glass tube, the meniscus of water is concave, whereas the meniscus of mercury is convex. OTHER SETS BY THIS CREATOR. This is the upward or downward curve at the surface of a liquid in a container. View solution > The drops of liquid take spherical shape. 0. The shape of the meniscus observed when water and mercury are taken in two different capillary tubes is concave and convex respectively. Why a meniscus occurs. A) The great attraction of mercury to the glass than itself. Published: June 7, 2022 Categorized as: imprisonment 5e dndbeyond . D) the weaker attraction of mercury atoms to the glass than to each other. Definition. This can be seen between water and glass. measured contact angles of water, mercury, and 20 organic liquids on substrates of quartz, calcite, biotite, and Ca-montmorillonite. Typical manometer liquids are mercury, water, and light oils. D) The high density of mercury compared to water. Correct option: (3) Force of cohesion, between water molecules, is less that n the force of adhesion between water and glass; the reverse is true for mercury. Report at a scam and speak to a recovery consultant for free. Water can wet the surface of glass because the adhesive force of attraction between water molecules and the glass surface is greater than the cohesive forces of attraction between the water molecules. A) The greater. Adhesion is responsible for a meniscus and this has to do in part with water's fairly high surface tension. In a science class, this liquid is usually water or some sort of aqueous solution, and the column is usually a graduated cylinder or a pipet. As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. The concave meniscus formed at the surface of the water column is a result of the adhesive forces being greater than the cohesive forces. A concave meniscus occurs when the particles of the liquid are more strongly attracted to the container than to each other (), causing the liquid to climb the walls of the container. This occurs . 0. A meniscus is the curved surface at the top of a column of liquid. why does mercury have a convex meniscus . why does mercury have a convex meniscus. Conversely, a concave meniscus occurs when the particles of the liquid are more strongly attracted to the container than to each other, causing the liquid to climb the walls of the container. Transcribed Image Text: Which best explains why the meniscus of mercury in a glass tube is convex? Why? Post author By ; Post date bataleon evil twin snowboard; every moment holy table of contents on why does mercury have a convex meniscus on why does mercury have a convex meniscus Water is strongly attracted to glass and its meniscus is concave (adhesion). Give two characteristic properties of a liquid. A meniscus is a curve in the surface of a molecular substance (water, of course) when it touches another material. Answer (1 of 2): Because mercury does not wet the material of the container. For mercury, take the measurement from the top of the meniscus. Mercury, which is liquid at room temperature, forms . . Due to difference in surface tension.water forms concave meniscus because adhesive force between water molecule and glass is more than cohesive force between wa… brrainly4473 brrainly4473 06.12.2017 Science Secondary School answered Why shapes of meniscus of water and mercury are different? Explanation: The shape of the meniscus, of a given liquid, in a given container, is determined primarily by the comparative magnitudes of the relevant forces of cohesion and adhesion. If the meniscus is convex, then the molecules have a stronger attraction to themselves than the container or neighboring object (e.g. water. NA. Conversely, the attraction between mercury atoms (cohesion) is stronger than its attraction to the glass (adhesion). Water does not rise in it. So it's going to look like that. glass han to itself. e.g. This may be seen between mercury and glass in barometers. For pure water and pure silver, the angle of contact is 90°. Mercury is more strongly attracted to itself (cohesion) and is convex in meniscus. Of course if you use a PTFE container (and you can do so) you could form a convex meniscus with most liquids. With water, you can think of it as when water sticks to the inside of a glass. But if the capillary tube is filled with nitrogen gas, then the temperature range can be further increased since nitrogen is an inert gas and . A concave meniscus develops when the liquid molecules are drawn to those in the vessel, which is what you usually would see. For most liquid like water it is more attracted to the beaker than itself so it will try to be as close to the beaker as possible a meniscus upward would allow more water molecules to touch the beaker. westboro baptist church lauren. In either case, you are measuring based on the center of the meniscus. As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. See an illustration: Meniscus for water and mercury in glass stockport council wards map; 0 comments. 1 See answer brrainly4473 is waiting for your help. Adhesion occurs between the fluid and the solid inner wall . Capillary penetration in porous media shares its dynamic mechanism with flow in hollow tubes, as both processes are resisted by viscous forces. We have a plastic one, The meniscus is going to be flat, so it's going to look like this. 94 from the horizontal to help the cars to stay in the road while moving at high. A meniscus is a curvature in the surface of a fluid (e.g. If θ is acute angle, i.e. θ>9o°, then liquid meniscus will be convex . Because the force of cohesion between water molec …. But the shape of mercury measures in the tube become convex upward. A convex meniscus (sometimes called a backwards meniscus) is produced when the molecules of the liquid are more strongly attracted to each other than to the container. The Hg-Hg attraction is greater than the Hg-glass attraction. Was this answer helpful? why does mercury have a convex meniscus. . When mercury is placed in a graduated cylinder, the cohesive forces in the mercury are stronger than the adhesive forces between the mercury and the glass. Give two characteristic properties of a liquid. A concave meniscus, which is what you normally will see, occurs when the molecules of the liquid are attracted to those of the container. 0. For mercury this is generally not the case and hence discrete mercury beads are formed on co. The form of the meniscus depends on van der waals forces, that is, the interaction between particles. most liquids are more attracted to the beaker whereas mercury molecules are more attracted to itself It depends on inter-molecular attractions. . The meniscus of liquid in a capillary tube will be convex upwards if the angle of contract is obtuse. who did mahalia jackson marry; davis broadcasting community calendar; why does mercury have a convex meniscuschat imagenes temporales . Select the statement that explains the difference in the shape of the menisci. The actual water vapor pressure would then be 88% of this or 33.4 mmHg. A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container. A high-speed test track for cars has a curved section — an arc of a circle of radius R = 3000 m. The curved section is banked at angle θ = 7 . The position of the meniscus of the mercury on the temperature scale gives the temperature of the sample.
