What liquids have convex meniscus?

A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container, as with mercury and glass. A flat meniscus occurs with water in some types of plastic tubes; tubes made out of material that water does not stick to.

Is a common example of liquid which forms a convex meniscus?

Conversely, a convex meniscus occurs when the particles in the liquid have a stronger attraction to each other than to the material of the container. Convex menisci occur, for example, between mercury and glass in barometers and thermometers.

For which of the following liquids the liquid meniscus in the capillary tube is convex?

The liquid meniscus in capillary tube will be convex, if the angle of contact is. Greater than 90. Less than 90° Equal to 90°

Does oil have a concave meniscus?

The oil will have a convex meniscus similar to that of mercury.

Why does mercury have a convex meniscus?

Formation of a Meniscus Mercury does not wet glass – the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass. When liquid mercury is confined in a tube, its surface (meniscus) has a convex shape because the cohesive forces in liquid mercury tend to draw it into a drop.

Why mercury forms 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. The strong cohesive forces within the mercury pull it together forming a convex shaped meniscus.

Do all liquids have concave meniscus?

All liquids have concave meniscus. Hint: Convex meniscus is formed when the cohesive forces are stronger , that is , attractive forces between molecules of same substance whereas concave meniscus is formed when the adhesive forces are stronger , that is , attraction between molecules of different substance.

Do all liquids have a meniscus?

Most liquids, including water, present a concave meniscus. 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. A good example of this shape of meniscus can be seen with mercury in a glass container.

Does oil have a convex meniscus?

B Such a liquid cannot form strong interactions with the polar Si–OH groups of glass, so the surface of the oil inside the capillary will be lower than the level of the liquid in the beaker. The oil will have a convex meniscus similar to that of mercury.

Why meniscus of mercury is convex?

Mercury does not wet glass – the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass. When liquid mercury is confined in a tube, its surface (meniscus) has a convex shape because the cohesive forces in liquid mercury tend to draw it into a drop.

What liquid has a concave meniscus?

Water-based fluids like sap, honey, and milk also have a concave meniscus in glass or other wettable containers. Conversely, a convex meniscus occurs when the particles in the liquid have a stronger attraction to each other than to the material of the container.

What is the difference between water meniscus and Mercury meniscus?

Water meniscus is convex, mercury menisucs is concave A meniscus can go up or down. It all depends on if the molecules of the liquid are more attracted to the outside material or to themselves. A concave meniscus, which is what you normally will see, occurs when the molecules of the liquid are attracted to those of the container.

How do you find the meniscus in chemistry?

Meniscus in Chemistry. A concave meniscus forms when the liquid molecules are more attracted to the container via adhesion than to each other via cohesion. A convex meniscus occurs when the liquid particles are more attracted to each other than to the walls of the container. Measure the meniscus at eye level from the center of the meniscus.

What is the difference between convex and flat meniscus?

A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container, as with mercury and glass. A flat meniscus occurs when water in some types of plastic tubes; tubes made out of material that water does not stick to.