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Why does meniscus of mercury curve in opposite directions?
The meniscus of mercury curves in opposite directions depending on the container it is in due to the difference in adhesive and cohesive forces. In a glass container, adhesive forces dominate causing a concave meniscus, while in a steel container, cohesive forces dominate causing a convex meniscus. The direction of the curvature is determined by the balance of these forces.
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.
What is the curvature that forms when water molecules stick to side of graduated cylinder at liquid air interface?
The curvature that forms when water molecules stick to the side of a graduated cylinder at the liquid-air interface is known as the meniscus. This curvature occurs due to surface tension and adhesive forces between the water molecules and the glass surface, causing the water level to either rise (concave meniscus) or fall (convex meniscus) compared to a flat surface.
How does adhesion and cohesion results to the formation of a meniscus?
Adhesion between water and the walls of the container causes the liquid to climb the walls, while cohesion between water molecules creates a curved surface at the top of the liquid. The combination of these forces results in the formation of a meniscus, which is concave for water in a glass container and convex for water in a narrow tube.
Does oil form a concave or convex meniscus?
Oil forms a concave meniscus when in a glass container due to its low adhesive forces with the container surface.
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.
Which meniscus is to be seen in the burette containing kmno4 solution and why?
In the burette containing KMnO4 solution, the concave meniscus is observed. This is because KMnO4 is a colored solution that has strong adhesive forces with the glass walls of the burette. As a result, the liquid molecules are more attracted to the glass, causing the meniscus to curve downward.
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.
Why does the the meniscus in a graduated cylinder filled with water curve downward?
The meniscus in a graduated cylinder curves downward due to adhesive forces between the water molecules and the glass surface of the cylinder. This causes the water molecules at the edge of the liquid to be attracted to the glass and form a concave meniscus shape.
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.
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!
Why does meniscus of water in glass curves upwards?
The meniscus of water in a glass curves upward due to surface tension. Water molecules are more attracted to the glass than to each other, causing them to climb up the sides of the glass. This creates a concave meniscus shape.
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.
What is the cresent shaped surface of a liquid that forms in pipettes and graduated cylinders?
The crescent shaped surface of liquid that forms in pipettes and graduated cylinders is known as a meniscus.The term for the shape of a liquid at its surface is known as a meniscus.It is called the meniscus. It is usually concave in all liquids; however, it is convex in mercury.
