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In the case of the convex meniscus, the contact angle has a value greater than 90. The meniscus of water in a glass tube is concave, but that of mercury is convex as shown to the right. why does mercury have a convex meniscus. Don't let scams get away with fraud. See an illustration: Meniscus for water and mercury in glass . For instance with glass, water has a degree of wetting where the surface of the water seeks to extend across the glass surface. As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. It can be either concave or convex. View solution > The drops of liquid take spherical shape. A concave meniscus, which is what you normally will see, occurs when the molecules of the liquid are attracted to those of the container. 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. Depending on the direction of pressure . As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. It occurs with water and a tube made of glass. Water is an example of a fluid that forms concave menisci. Why? This occurs . It is so when one end of a glass capillary tube is immersed in a trough of mercury. westboro baptist church lauren. A convex meniscus occurs, for example, between Mercury and glass in barometers and thermometers. This occurs between water and glass. A meniscus occurs because of surface tension. A convex meniscus occurs when the liquid particles are more attracted to each other than . Explanation: Metallic bonding clearly accounts for the convex meniscus observed in mercury metal in glass vessels. 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? A) The great attraction of mercury to the glass than itself. But in a plastic graduate cylinder it forms a flat meniscus. Don't let scams get away with fraud. 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. Physics. The temperature range that can be measured by a typical mercury thermometer is 37 to 356 C. With water, you can think of it as when water sticks to the inside of a glass. If a silica glass tube is positioned vertically in a reservoir of water, the same forces of adhesion and cohesion are at work. Similar questions. For water and most liquids, this is the bottom of the meniscus. 2. 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. The meniscus is concave to increase the area of contact between glass and H2O. The meniscus of mercury in a glass capillary tube is convex because of A) the very high density of mercury as compared with water. 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. If is 90, then liquid meniscus will be plane. This is a consequence of metallic bonding; and it is formally termed an ameniscus, or a convex meniscus (as opposed to the concave menisci, that water forms). Conversely, the attraction between mercury atoms (cohesion) is stronger than its attraction to the glass (adhesion). Meniscus is caused by surface tension. why does mercury have a convex meniscus. argo parts amazon. 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 = 7 . The meniscus is convex to minimize the . Shape of a Meniscus. D) The high density of mercury compared to water. The form of the meniscus depends on van der waals forces, that is, the interaction between particles. The cohesive forces in water and mercury are stronger than the adhesive forces to the nonpolar wax on the floor. When a glass capillary immersed in water, the meniscus is concave upwards. 3. h , \(\frac{1}{r}\) this is in the form y \(\frac{1}{x}\) Hence when we draw graph between 'h' and 'r' we get a graph of hyperbola. Mercury metal is more attracted to itself than to the walls of the glass manometer. Transcribed Image Text: 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. D) the weaker attraction of mercury atoms to the glass than to each other. D) The high density of mercury compared to water. When cohesive forces are greater than adhesive forces the meniscus is concave, as is the case with glass and water. In the case of water and most liquids, the meniscus is concave. A meniscus occurs because of surface tension. Water and glass meniscus is a down ward curve because the glass pulls on the water molecules with a slightly greater force than that which exists . Which best explains why the meniscus of mercury in a glass tube is convex? So in this problem wants to know why is it that water forms a concave and just just any glass graduated cylinder. The concave meniscus formed at the surface of the water column is a result of the adhesive forces being greater than the cohesive forces. 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. 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. If the interaction between a particle of water and a particle of recipient is strong than the interaction between water itself, then the water rises and the meniscus is convex. 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. why does mercury have a convex meniscus. For a flat meniscus, make sure the liquid is level. View the full answer. Was this answer helpful? attractive forces between mercury atoms are stronger than the attraction between the mercury and the glass. See an illustration: Meniscus for water and mercury in glass Again, since polar molecules like to stick together, the water in a glass tube will actually tend to stick to the sides of the tube. stockport council wards map; 0 comments. A meniscus is a curve in the surface of a molecular substance (water, of course) when it touches another material. For ordinary water and glass, it lies between 8 and 18. why does mercury have a convex meniscus. The angle of contact increases and becomes obtuse. . You should always measure light liquids at the bottom of the meniscus and . mercury to the B) The lower attraction of mercury to the glass than to itself. Medium. The meniscus of liquid in a capillary tube will be convex upwards if the angle of contract is obtuse. Give two characteristic properties of a liquid. water. For Mercury it is more attracted to it self. The word itself comes from the Greek for 'crescent', and you can . A concave meniscus forms when the liquid molecules are more attracted to the container via adhesion than to each other via cohesion. <9o, then liquid meniscus will be concave upwards. Mercury is more strongly attracted to itself (cohesion) and is convex in meniscus. The actual water vapor pressure would then be 88% of this or 33.4 mmHg. 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. This can be seen between water and glass. In some cases, the meniscus appears flat (e.g., water in some plastics). The strong cohesive forces . For mercury, take the measurement from the top of the meniscus. Mercury. Capillary penetration in porous media shares its dynamic mechanism with flow in hollow tubes, as both processes are resisted by viscous forces. A good example of this shape of meniscus may be seen with mercury in a glass container. Published: June 7, 2022 Categorized as: imprisonment 5e dndbeyond . 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. Measure so that the line you are reading is even with the center of the meniscus. A flat meniscus occurs with water in some types of plastic tubes; tubes made out of material that water does not stick to. A) The greater. who did mahalia jackson marry; davis broadcasting community calendar; why does mercury have a convex meniscuschat imagenes temporales . This is the upward or downward curve at the surface of a liquid in a container. Adhesion occurs between the fluid and the solid inner wall . In terms of adhesion and cohesion, explain why mercury has a convex meniscus in glass tube. Give two characteristic properties of a liquid. C) The low surface tension of mercury. Typical manometer liquids are mercury, water, and light oils. 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 . mercury to the B) The lower attraction of mercury to the glass than to itself. E) The repulsion between mercury and . OTHER SETS BY THIS CREATOR. A meniscus can go up or down. Glass is electrically polarizable, and attracts charged . Hence the liquid in the trough is . Therefore, the atoms pull together and away from the glass. We have a plastic one, The meniscus is going to be flat, so it's going to look like this. If is obtuse, i.e. The air pressure on the upper or concave side of the meniscus is the atmospheric pressure P. We know that the pressure on the convex side of the free surface is less than that on the concave side. E) electrostatic repulsion . . westboro baptist church lauren. Was this answer helpful? -If you put mercury in a glass tube, the meniscus is straight because the mercury atoms can form bonds with another but not with the glass; as a result, the cohesive forces are much greater than the adhesive forces and the meniscus is shaped like an inverted U. Hence, shape of water meniscus is concave while that of mercury meniscus is convex. why does mercury have a convex meniscus . Because the force of cohesion between water molec . In either case, you are measuring based on the center of the meniscus. The Hg-Hg attraction is greater than the Hg-glass attraction. For pure water and perfectly clean glass, the angle of contact is 0. (ii) in case of mercury . Physics. Report at a scam and speak to a recovery consultant for free. 0. 0. Mercury has very small adhesive forces with most container materials, and strong cohesive forces. The meniscus is concave when adhesive forces are stronger than cohesive forces. B) the low surface tension of mercury C) the greater attraction of mercury atoms to the glass than to each other. The shape of the meniscus observed when water and mercury are taken in two different capillary tubes is concave and convex respectively. If is acute angle, i.e. 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? mercury The curved surface of a liquid inside a container is the meniscus. A meniscus is a curvature in the surface of a fluid (e.g. measured contact angles of water, mercury, and 20 organic liquids on substrates of quartz, calcite, biotite, and Ca-montmorillonite. It's worth saying here that mercury was a common manometer fluid in the past, but has largely been replaced due to its environmental and health hazards. The meniscus (plural: menisci, from the Greek for "crescent") is the curve in the upper surface of a liquid close to the surface of the container or another object, caused by [[surface tension] . . Why? Water meniscus is concave, mercury meniscus is convex. Consequently, a common apparatus used to demonstrate the phenomenon is the capillary tube.When the lower end of a glass tube is placed in a liquid, such as water, a concave meniscus forms. This may be seen between mercury and glass in barometers. Therefore, the liquid bathes or wets the glass wall, retaining a quantity of liquid and giving the meniscus a concave shape. why does mercury have a convex meniscus. 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 A meniscus is the curved surface at the top of a column of liquid. e.g. Transcribed image text: 35. For pure water and pure silver, the angle of contact is 90. 0. As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. Answer (1 of 2): Because mercury does not wet the material of the container. A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container. Because mercury still exhibits metallic bonding, even in the liquid state, and metal-metal interactions are stronger than the metal glass . On the other hand surface tension of mercury is si. Water on the other hand, is made up of electrically polar molecules. . 1 See answer brrainly4473 is waiting for your help. So it's going to look like that. When a liquid has concave meniscus, the angle of contact is acute. A convex meniscus occurs because, as with mercury and glass, the molecules have a greater attraction to each other than to the container. It is called a meniscus. water) as a result of molecular interactions with a container or object. Surface tension of ethanol is one third that of water. Mercury is an example of a liquid that forms convex menisci. NA. Which molecules exhibit only London (dispersion) forces? glass han to itself. C) The low surface tension of mercury. E) The repulsion between mercury and the . Water is strongly attracted to glass and its meniscus is concave (adhesion). Convex. Well sure, you can have a convex meniscus. Mercury produces a convex meniscus. why does mercury have a convex meniscus; By . most liquids are more attracted to the beaker whereas mercury molecules are more attracted to itself It depends on inter-molecular attractions. If you filled it with mercury, you would get a meniscus that looks like this where there's a bulge near the center when you're further away from the container than when you're at the container. The meniscus of water curves up the sides of the cylinder, while heavy liquids like mercury curves down the cylinder. Meniscus and wetting are caused by surface tension. A meniscus is the curved surface at the top of a column of liquid. 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. 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. Glass molecules also happen to be polar. Medium. Conversely, a concave meniscus occurs when the molecules of the liquid attract those of the container. The shape of the meniscus observed when water and mercury are taken in two different capillary tubes is concave and convex respectively. Weak adhesive forces result in spherical drops. 94 from the horizontal to help the cars to stay in the road while moving at high. so . You can see this at the top of the graduated cylinder, where the water will slightly creep up the sides and form a curve, which is the meniscus. If the meniscus is convex, then the molecules have a stronger attraction to themselves than the container or neighboring object (e.g. The word itself comes from the Greek for 'crescent', and you can . 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. 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 = 7 . View solution > The drops of liquid take spherical shape. The position of the meniscus of the mercury on the temperature scale gives the temperature of the sample. Mercury, which is liquid at room temperature, forms . Meniscus in Chemistry . Definition. A) The greater. 0. A meniscus is the curved surface at the top of a column of liquid. 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 100% (2 ratings) The shape of the meniscus is determined by the forces of cohesion and adhesion, and the meniscus forms in the capillary tube. Why? It is convex when cohesion is stronger. When it has a convex meniscus, the angle of contact is obtuse. , NF3 CHA CH2C1 L Determine the solid with the highest melting point. Published: June 7, 2022 Categorized as: imprisonment 5e dndbeyond . The concave meniscus formed at the surface of the water column is a result of the adhesive forces being greater than the cohesive forces. e.g. Why a meniscus occurs. For mercury this is generally not the case and hence discrete mercury beads are formed on co. mercury which is non-polar thus not attracted to its glass container . The shape of the water meniscus in the tube becomes concave upwards. See Page 1. or meniscus, of the water is therefore U-shaped. glass han to itself. The metal is more attracted to itself than to the sides of the glass. A concave meniscus develops when the liquid molecules are drawn to those in the vessel, which is what you usually would see. This is the upward or downward curve at the surface of a liquid in a container. Alcohol does exact the same, but mercury for example, not. E.) So if we have a glass graduated cylinder, the meniscus is going to curve downward. Water does not rise in it. It all depends on if the molecules of the liquid are more attracted to the outside material or to themselves. Little drops of mercury will form into almost spheres when spilled on most surfaces (gravity will bend them out of shape). 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.