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Why does the the meniscus in a graduated cylinder filled with water curve downward?
Wiki User
∙ 12y ago
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).
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoThe meniscus is concave because the water molecules actually try to cling to the side of the cylinder.
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When using a glass graduated cylinder partially filled with water always read the mark closest to the bottom of the meniscus true or false?
True
Which of the following is important to do in order to get a accurate liquid volume measurment?
If using a graduated cylinder, take into consideration the meniscus, which presents itself as a concave depression on the surface of the liquid in a cylindrical vessel or a convex bulge if such a container is filled to the brim. The height of the meniscus should be divided in half. If you don't have a graduated cylinder, utilize the formula pi times radius squared times the height (don't forget to adjust for the meniscus) of the liquid in a cylinder.
What is a measuring cylinder used to for?
A graduated cylinder is used to measure the volume of a liquid and occasionally a solid (it can be inverted and used to measure gas as well!) The cylinder is made of glass (usually Pyrex) or plastic and has measured lines with volume values noted on the lines (a.k.a. graduations.) Simply fill the cylinder with a liquid until it reaches the volume you require. When measuring the liquid level you will notice that electrostatic forces and gravity alter the shape of the liquid's surface to a crescent shape. This is called a "meniscus." In most cases the shape will look like a smile, you must make the measurement so the bottom portion of the smile shape is lined up with the graduation mark on the cylinder. Occasionally the meniscus will be close to flat or inverted like a frown, such is the case with liquid mercury. In such scenarios, the uppermost portion of the frown shape should be used for accurate measurement. To measure the volume of a small solid object of irregular shape, you can measure out a certain volume of a liquid (like water) in the cylinder, and then carefully place the solid objects in the cylinder, making sure they are completely submerged and contain no air bubbles. The water is displaced to a new reading on the graduated cylinder and the difference between the original and the final readings is the volume that the solid object occupies. Measuring the volume of a gas is more complicated to set up and explain. In general the graduated cylinder is filled with liquid and inverted in a large container filled with water. The gas reaction evolves gas through a tube, directly under the inverted cylinder, and rises to the top (the base of the inverted cylinder). The amount of gas produced will displace the water downward as it fills the top of the cylinder and can be measured using the graduations when the gas has ceased. This will give you the volume that the gas occupies. If the gas is soluble in the liquid, some may remain dissolved and give a false-low volume reading.
What are some things that can happen if you drop a piece of metal into a graduated cylinder partially filled with water?
It could sink. (The metal's density is greater than water.) It could turn into a ball of flames. (If you dropped a chunk of sodium into graduated cylinder, it would react with flames or sparks.)
Why is water meniscus convex when the container is fully filled?
The H20 molecules are bound together, it is called surface tension.
When using a glass graduated cylinder partially filled with water always read the mark closest to the bottom of the meniscus true or false?
True
Which of the following is important to do in order to get a accurate liquid volume measurment?
If using a graduated cylinder, take into consideration the meniscus, which presents itself as a concave depression on the surface of the liquid in a cylindrical vessel or a convex bulge if such a container is filled to the brim. The height of the meniscus should be divided in half. If you don't have a graduated cylinder, utilize the formula pi times radius squared times the height (don't forget to adjust for the meniscus) of the liquid in a cylinder.
How do you measure the volume of liqiud?
When a liquid is filled in a cylinder, the liquids usually form a bubble called meniscus. Then you measure the lowest point of the meniscus and record the measurement.
How do you read a graduated cylinder while using the meniscus?
The most accurate way to read a graduated cylinder is to place it on a flat surface. Bend down so you are eye level with the Meniscus Line, the line that is formed by the border between the unfilled portion of the cylinder and the top of the liquid. The very lowest part of this line is where you read the measurement. The markings are in whole numbers, 1, 2, 3, etc., with 10 lines between each number.
How much does a 10ml graduated cylinder filled with water weigh?
Depends on the weight of the glass. The water weighs 10 grams if filled to the 10 ml mark - more if overfilled, of course.
What is a measuring cylinder used to for?
A graduated cylinder is used to measure the volume of a liquid and occasionally a solid (it can be inverted and used to measure gas as well!) The cylinder is made of glass (usually Pyrex) or plastic and has measured lines with volume values noted on the lines (a.k.a. graduations.) Simply fill the cylinder with a liquid until it reaches the volume you require. When measuring the liquid level you will notice that electrostatic forces and gravity alter the shape of the liquid's surface to a crescent shape. This is called a "meniscus." In most cases the shape will look like a smile, you must make the measurement so the bottom portion of the smile shape is lined up with the graduation mark on the cylinder. Occasionally the meniscus will be close to flat or inverted like a frown, such is the case with liquid mercury. In such scenarios, the uppermost portion of the frown shape should be used for accurate measurement. To measure the volume of a small solid object of irregular shape, you can measure out a certain volume of a liquid (like water) in the cylinder, and then carefully place the solid objects in the cylinder, making sure they are completely submerged and contain no air bubbles. The water is displaced to a new reading on the graduated cylinder and the difference between the original and the final readings is the volume that the solid object occupies. Measuring the volume of a gas is more complicated to set up and explain. In general the graduated cylinder is filled with liquid and inverted in a large container filled with water. The gas reaction evolves gas through a tube, directly under the inverted cylinder, and rises to the top (the base of the inverted cylinder). The amount of gas produced will displace the water downward as it fills the top of the cylinder and can be measured using the graduations when the gas has ceased. This will give you the volume that the gas occupies. If the gas is soluble in the liquid, some may remain dissolved and give a false-low volume reading.
How is volume of an irregular object calculated?
To find the volume of an irregular object such as a rock, you have to use displacement. If you place the object in a graduated cylinder filled with water, the volume of the object is equal to the amount of water that the object displaces. For example, if a graduated cylinder is filled with 100mL of water, and you place an object such as a rock and the water rises from 100mL to 106mL, then the volume of the rock is 6.
What are some things that can happen if you drop a piece of metal into a graduated cylinder partially filled with water?
It could sink. (The metal's density is greater than water.) It could turn into a ball of flames. (If you dropped a chunk of sodium into graduated cylinder, it would react with flames or sparks.)
How would you determine the capacity of your shoe?
you can put a solid in the shoe until it is filled to the top then take the solid out and put into a graduated cylinder to measure the capacity of your shoe.
How can you calculate the volume of an irregularly shaped object?
If the object in question is water proof, and small enough. You can measure the amount of displaced water when it is placed in a tank full of water, this may not work for a lot of things but it can help when attempting to measure some objects.
What do you call the procedure that helps you determine the volume of an irregularly shaped object while using a graduated cylinder?
displacement - invented by Archimedes. Completely fill a large volume of something with water. Have a spout to channel all excess water. Place a graduated cylinder under the spout. Place irregular object in the large volume filled with water. The volume of the irregular object will displace an equivalent volume of water into the graduated cylinder. The measured volume in the cylinder is the volume of the irregular object.
Why is water meniscus convex when the container is fully filled?
The H20 molecules are bound together, it is called surface tension.
