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When does the meniscus of a liquid in a glass tube curve downward?
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoDownwards in the middle or downwards at the edges? Water's meniscus goes down in the middle, because the amount its particles are attracted to each other (coherence) is less than the amount they are attracted to the glass walls (adherence). Mercury's meniscus goes down at the edges and up in the middle, because its coherence is greater than its adherence.
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Are correct procedures for reading the volume of water in the graduated cylinder?
Water in a glass graduated cylinder adheres to the sides of the cylinder, forming a meniscus which is an upward curve. When reading volume in a cylinder, look at the meniscus at eye level. Read the volume at the bottom of the curve.
How does a glass thermometer works?
As the liquid in the thermometer is heated it expands, and the only way the expanding liquid can go is upward. As the liquid in the thermometer cools, it will contract, and the liquid will fall back down into the resevoir, causing the column of liquid to move downward.
What is liquid-in-glass thermometer?
what do they use for the liquid in glass ball thermometer
Why do the light pases without bending from center of curvature?
well if you try to send light through a curve glass it will bend except in the middle its because the middle of the glass is the focal point of the glass .the ray doesn't bend though the curve is a normal glass a concave mirror or a convex glass it appers the same from the other side
Why are the thermometers called liquid in glass thermometers?
A so-called "glass" thermometer has a small bore-hole in the center of the glass that has some liquid in it. It's the activity of the liquid in the narrow hole that makes the thermometer a thermometer.
Is the curve at a liquids surface by which you measure the volume of a liquid?
The meniscus is the curve at a liquid's surface by which one measures the volume of the liquid. A meniscus can be concave or convex depending on whether it is attracted to itself or the glass.
What is a curved surface on a liquid called?
A meniscus, but whether it has a positive curve or a negative one depends on whether it wets the glass.
What do you read in a graduated cylinder to identfy the exact amount of liquid in it?
You *don't* read the line where the fluid meets the glass. You look past it, to the middle of the downward curve in the fluid, the "meniscus" and read from that.
How can you relate volume to a meniscus?
When measuring the volume of a liquid in a graduated cylinder, you read it at eye-level and at the bottom of the curve of the meniscus. This is true for water and aqueous solutions. Some "non-water" liquids do not form a meniscus in a glass cylinder. Also, water does not form a meniscus in a plastic cylinder.
What is the scientific name for the curved water surface above the rim of a glass?
The curve you see on top of a liquid in a cylinder is called the meniscus and is due to the difference between the attractive force between the liquid molecules themselves and between the liquid molecules and the wall of the cylinder, as well as capillary action. When the molecules of the liquid have a greater attraction to the cylinder wall than to themselves, the meniscus is concave and the surface of the liquid curved downwards. Water drawn up a narrow glass cylinder has a concave meniscus. When the molecules of the liquid have a greater attraction to themselves than to the cylinder wall, the meniscus is convex and curves upwards. Mercury in a glass thermometer or barometer has a convex meniscus.
How do you use measuring cylinder?
A graduated cylinder is used to measure liquid volume in milliliters, mL. When you place a liquid into a glass graduated cylinder, you will see that the "line" at the top of the column of liquid is actually curved downward. This is called the meniscus. When you measure the liquid volume, you record the volume in mL at the bottom of the meniscus.
Why does meniscus of water in glass curves upwards?
Adhesion to the test tube or cohesion of the liquid molecules causes the meniscus to form.
What is a meniscus is and how it is used to measure liquids?
A meniscus is the curve of a liquid. Like when you are filling a glass of water, if you continue to put water in the glass after it has reached the top, then the extra water will go above the glass in a curved shape. When you are measuring liquids in for example a graduated cylinder, you would take the measurement from the bottom of the meniscus. I hope this helps!
What is the meniscus line?
A meniscus line is the little line that you have at the top of a liquid. If you fill a glass up with water, the line that seems to sit at the top of the water that you see when you look at the glass at eye level is the meniscus line.
Why does the the meniscus in a graduated cylinder filled with water curve downward?
The water is slightly attracted to the glass walls of the cylinder and is to some slight degree climbing up the walls in a form of capillary action (the tube itself can be regarded as a large capillary).
Which property of water causes water to curve in a graduated cylinder?
With most liquids, the attractive force between the liquid and the container is greater than the attraction between the individual liquid molecules. So the liquid "sticks" to the side of the container. A few liquids have a "backwards" meniscus. An example is mercury. If you put mercury in a test tube, it would be higher in the middle than at the edges.
Are correct procedures for reading the volume of water in the graduated cylinder?
Water in a glass graduated cylinder adheres to the sides of the cylinder, forming a meniscus which is an upward curve. When reading volume in a cylinder, look at the meniscus at eye level. Read the volume at the bottom of the curve.
