What liquids have a convex meniscus?

What liquids have a convex meniscus?

A concave meniscus, which is what you normally will see, occurs when the molecules of the liquid are attracted to those of the container. This occurs with water and a glass tube. A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container, as with mercury and glass.

What is an example of a meniscus?

The definition of a meniscus is the fibrous cartilage in a knee joint, or the curved upper surface of liquid that touches the sides of a jar, or a lens that is convex on one side and concave on the other. When oil is in a jar and the oil has a curve on the top of its surface, this is an example of meniscus.

Is a meniscus concave or convex?

A meniscus is a phase boundary that has been curved because of surface tension. In the case of water and most liquids, the meniscus is concave. Mercury produces a convex meniscus.

Why mercury has a convex 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.

How is a meniscus read?

A meniscus occurs because of surface tension in the liquid and must be read at eye level. For a concave meniscus, the correct volume will be read at the bottom of the curve. For a convex meniscus, the opposite is true and the correct reading will be at the top of the curve.

Why does a meniscus form?

Why a meniscus occurs Adhesion is responsible for a meniscus and this has to do in part with water’s fairly high surface tension. And since water molecules like to stick together, when the molecules touching the glass cling to it, other water molecules cling to the molecules touching the glass, forming the meniscus.

What makes a meniscus form?

Why a meniscus occurs Water molecules are attracted to the molecules in the wall of the glass beaker. And since water molecules like to stick together, when the molecules touching the glass cling to it, other water molecules cling to the molecules touching the glass, forming the meniscus.

Which way does a convex meniscus curve?

The meniscus of a liquid is the upward or downward curve seen at the top of a liquid in a container. The nature of curve whether upward (convex) or downward (concave) depends on the surface tension the liquid and its adhesion capacity to the wall of the container.

How do you read a convex meniscus?

What is lower meniscus and upper meniscus?

Reading a Meniscus You may notice a ‘line’ of liquid at the very top, forming the curve itself. The bottom of the curve is the lower side of this line. For a convex meniscus, you do the opposite and read the volume at the top of the curve.

What is a torn meniscus in the knee?

The meniscus is a C-shaped piece of tough, rubbery cartilage that acts as a shock absorber between your shinbone and thighbone. It can be torn if you suddenly twist your knee while bearing weight on it. A torn meniscus is one of the most common knee injuries.