How do you measure from the bottom of the meniscus?
Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus. For mercury, take the measurement from the top of the meniscus. In either case, you are measuring based on the center of the meniscus.
When reading a graduated cylinder reading the water level correctly is important Explain what a meniscus is and why it is important when reading a graduated cylinder?
Terms in this set (13) Why does a meniscus occur? When reading a volume in a graduated cylinder, it is also important that your eyes are level so that you are not looking at the meniscus from the top or the bottom. THe graduated cylinder also needs to be on a level table. Thus you will need to bend down to read it.
At what level should your eye be when you read a meniscus?
Steps to reading Graduated Cylinders: The water in a cylinder will form a curve called the meniscus 3. Your eye should be level with the top of the liquid 4. Find the bottom of the curved meniscus in the water. This should be in the center of the graduated cylinder.
How does the meniscus affect reading the correct volume?
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.
Do you measure to top or bottom of meniscus?
The key to getting an accurate reading, is to measure the center of the meniscus whether it be concave or convex. E.g. with a concave meniscus, measure the bottom of the meniscus and for convex meniscus, take the reading from the top of the meniscus.
What is the correct position for viewing a meniscus quizlet?
The meniscus must be read consistently from the top of the graduated cylinder. Parallax error is the apparent displacement of an object as seen from two different viewpoints that are not in line with the object. The meniscus must consistently be read at eye level. In the titration part of our experiment with a buret..
Is it OK to fill a Buret above eye level?
Why must you fill the Buret only when its top is below eye level? You must be at eye level with the bottom of the meniscus (curved surface of liquid) to read the buret. Reading from above or below the meniscus will result in a parallax error.
What happens if you read the meniscus above eye level?
This curve is known as a meniscus. The graduated cylinder is calibrated so that reading the bottom of the meniscus, when viewed at eye level, will give accurate results. Viewing the meniscus at any angle other than eye level will give inaccurate results.
Which is the most accurate way to read a graduated cylinder?
The liquid is always curved downward in the graduated cylinder and this curve is called meniscus. The reading always considered at the bottom of the meniscus, it is the correct way to take a reading.
What is a meniscus on a graduated cylinder?
Biology Glossary search by EverythingBio.com. A concave surface of a liquid resulting from surface tension. The bottom of the meniscus is used to measure the volume of a liquid in apparatus such as a graduated cylinder.
How can we determine the volume of a liquid with a meniscus that curves upward?
Explanation: When it curves upwards it reveals that the liquid has stronger adhesive force than cohesive force. When meniscus of liquid curves upward in a calibrated container the volume of the liquid is determined by reading the values at the bottom of the curving point.
Which is the best way to read a manometer?
When reading a manometer, it is good practice to: a. Read at the bottom of the meniscus b. Read at the top of the meniscus d. Carefully estimate the average of the meniscus 10. If a pressure range of 0 to 1 inch of water is to be measured and recorded, an instrument capable of doing this would be: a.
Which is the correct way to read a meniscus?
When you read a scale on the side of a container with a meniscus, such as a graduated cylinder or volumetric flask, it is important that the measurement accounts for the meniscus, and take this advice to heart. Measure so that the line you are reading is even with the centre of the meniscus.
What causes a reading error on a manometer?
Manometer users must be aware of meniscus error. Meniscus occurs when the particles of the liquid stick to the sides of the glass tube. Depending on the direction of pressure applied, the meniscus can be concave or convex. Either way, a reading error may occur. Let’s have a look at a couple of other types of manometers.
Where is the meniscus on a graduated cylinder?
When you read a scale on the side of a container with a meniscus, such as a graduated cylinder or volumetric flask, it’s important that the measurement accounts for the meniscus. Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus.