Generally, all laboratories widely use the graduated cylinder. In addition to it, people call it a measuring cylinder and mixing cylinder because it helps in measuring the quantity of the liquids and chemical mixing. It is a long narrow vessel with measuring marks on it. Polypropylene or polymethylpentene makes the graduated cylinders resistant to the corrosive chemicals and makes the equipment transparent if used.
How to Read a Graduated Cylinder with Sig Figs?
The significant figures in a graduated cylinder can be read in the following ways:
- It is important to note meniscus. The meniscus is the curved liquid surface. Generally, we read the volume by reading the bottom of the meniscus.
- Since the smallest division is 1ml, therefore, the reading error will be +0.1ml or-0.1 ml. Hence, whatever the reading will be, its error will be 1/10th of it.
How do You Find the Volume of a Liquid in a Graduated Cylinder?
It is a graduated measure of the volume of a liquid. To be able to effectively read the volume measurement of the liquid, we must follow the next steps:
- Place the graduated cylinder on a flat surface and match the height of the liquid column directly with the level of your eye.
- Generally, due to the superficial tension property of the liquid, this will tend to curve downward called the meniscus.
- Hence, read the volume value at the bottom of the meniscus.
Graduated Cylinder Sizes
The various sizes for graduate cylinder are as follows:
- The size ranges from as small as 10ml to 2 liters.
- The graduate cylinder is usually made from an acid-resistant glass material or Polypropylene or polymethyl pentene.
- A glass graduated cylinder forms a meniscus. A plastic glass graduated cylinder does not form a meniscus hence, the liquid level is flat.
How to Find the Volume of Water in a Graduated Cylinder?
The steps are as follows,
- Take a clean and properly marked graduate cylinder. Take water in a graduated cylinder to a certain level.
- There is a curved water surface in a glass graduated cylinder. Superficial tension liquid property helps in the curved surface.
- Put your eye level with the water level in the glass graduated Hence, the reading should be just below the curved surface.
- In the case of a plastic graduated cylinder, the meniscus does not form. Hence, reading is easier.
1. 25ml Graduated Cylinder Increments
The various sized graduate cylinders have many increments. For example:
- A 10ml glass and plastic graduated cylinder has 0.1 ml increments.
- A 50ml glass and plastic graduated cylinder has 0.5 ml increments.
- A 500 ml glass and plastic graduate cylinder have 5 ml increments.
- A 1000 ml glass and plastic graduated cylinder has 10 ml increments.
- A 2000 ml glass and plastic graduated cylinder has 20 ml increments.
2. Meniscus Graduated Cylinder
- Generally, reading a scale on a container with meniscus is difficult. Always put the graduated cylinders on an even level surface for reading.
- Measure the line you are reading when the meniscus is even. The liquid bottom is the measurement for all the liquids.
- Get eye level with the meniscus and bent down if required to get the accurate reading.
3. Common Uses of Graduated Cylinder
The graduate cylinders are used as follows,
- It is mostly used for measuring the volume of a liquid.
- Generally, graduate cylinders gave better reading but the volumetric analysis should not be performed.
- Besides liquid volumes, graduated cylinders also measure solids volumes by measuring the liquid displacement.
4. The Shape of a Graduated Cylinder
- Usually, a graduated cylinder is narrow and tall. Besides, it increases the reading precision and accuracy.
- Generally, it measures volume, mixes liquids, etc. It stands on a plastic or glass base.
- Normally, it has a spout for easy pouring. Mixing cylinders have ground glass joints. A stopper closes the opening.
- A graduated cylinder measures liquid volumes.
- The reading should be done at eye level. To get the accurate reading, you can bend down if required.
- The reading error is 1/10th liquid volume.
- Generally, meniscus occurs only in a glass graduated cylinder.
- Take the reading from the center of the meniscus.
- Generally, the meniscus does not occur in plastic made graduated cylinder.
- Moreover, the graduate cylinders are available from 1 ml to 2000ml with 1/10th.
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