Why the meniscus is concave up of water in a glass tube?
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 a meniscus and why do some liquids develop a meniscus?
This is the downward or upward curve at the surface of a liquid in a container. Depending on how the molecules of the liquid interact, this curve may either be concave or convex. A meniscus occurs because of surface tension in the liquid and must be read at eye level.
Why does water curve in a graduated cylinder?
Since opposites attract, the positive sides attract the negative sides, and all of the molecules stick to one another. This is why water droplets can form. 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.
Why does water curve downward when placed in a glass tube?
the water curve downward when placed in a glass tube because water has lower force of attraction than solid. so it fills the container in which it is kept.
Why does water pour down the side of the glass?
Angle and speed When the angle between vertical direction and the glass wall is small, surface tension is stronger and the component of gravity perpendicular to the glass wall is small; consequently, water sticks to the outside surface of the container (or in other words, runs down the side of the container).
Why does water curve in a graduated cylinder quizlet?
Why does water curve in a graduated cylinder? The molecules of liquid in general are attracted to those of the container. Convex Meniscus occurs when these molecules are stronger in attraction to each other than the container. What is the pH of surface waters?
When water is placed in glass cylinder which curve is formed?
Water when placed in a glass tube, its curve goes down, which is known as concave meniscus, forms due to the force of adhesion between the molecules of glass and water.
What is it called when water sits above the glass?
The little bulge upwards by the water above the lip of the glass is called a meniscus. It’s caused by surface tension. The water molecules attract to each other strongly enough to hold that slight curve.
What type of meniscus is formed when water is filled with water?
When you fill a glass with water, water forms a concave meniscus with constant contact angle θ (typically θ = 20 ∘ for tap water): Once you reach the top of the glass, the water-air interface becomes convex and water rises up to a height Δh above the edge of the glass,…
Where is the meniscus on a graduated cylinder?
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.
Why does water stick to the sides of a glass tube?
Glass molecules also happen to be polar. 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! 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. Barb (published on 10/22/2007)
What causes water to creep up a glass?
The answer lies in surface tension. If one puts water into a uniform cylinder and looks at the air-water interface at the edge where the water comes into contact with the cylinder, one will see that the water creeps up the glass a small amount.