Why is the error large when the measuring range of the graduated cylinder is selected?

How can this be said from a chemical perspective? Nothing to do with chemistry. is that the scale is that the volume corresponding to each small grid has become larger, and no one is a god, and it will not be so accurate.

The minimum scale value of different specifications of the graduated cylinder is different, which determines the accuracy of the graduated cylinder of different specifications, and the error size is different.

-The minimum scale of a 10ml graduated cylinder is 1ml, and the minimum graduation of a 100ml graduated cylinder is 1ml

- If you use a 10ml measuring cylinder, the maximum error is 1ml

- Therefore, it is generally necessary to choose a graduated cylinder that is slightly larger than the volume of the liquid measured, so that the volume measured is the most accurate and the error is minimal.

The measure has become larger. Originally, a scale was 10ml, but now a scale is 100ml, do you say it can be accurate?

The measuring range is small and the engraving is fine, so it is accurate.

Graduated cylindersPrecisionIt's ml,mlThe specifications of the graduated cylinder are expressed in terms of the maximum capacity (ml) of the energy volume, and the commonly used ones are 10ml, 25ml, 50ml, 100ml, 250ml, 500ml, 1000ml, etc. The scale on the outer wall is in ml, and each small grid of a 10ml graduated cylinder represents slag, and each small grid of a 50ml graduated cylinder represents 1ml.

When measuring liquids, choose the right size of the graduated cylinder according to the volume measured: Hongzhi

When reading, the graduated cylinder should be placed vertically and smoothly on the table, and the scale of the graduated cylinder should be kept on the same level as the lowest point of the concave liquid level of the liquid inside the graduated cylinder. Generally speaking, the finer the diameter of the graduated cylinder, the better, so the higher the accuracy, because the area of the circle can only be calculated as a rough number, so the larger the diameter, the greater the error.

Graduation value of the graduated cylinder:

The scales on the outer wall are in ml, with a 10 ml cylinder representing ml per compartment and a 50 mL cylinder representing 1 mL per compartment. The larger the visible graduated cylinder, the thicker the diameter, the smaller the accuracy, and the greater the reading error caused by the deviation of the line of sight.

The graduated cylinder is a crude measuring device, and its family of eggplant is accurate. If the minimum scale of a graduated cylinder with a capacity of 5ml is, its accuracy is;

If the minimum scale of a graduated cylinder with a capacity of 10ml is, its accuracy is; A graduated cylinder with a capacity of 50 ml has a minimum scale of 1 ml, an accuracy of 1 ml, and so on. Common, more accurate graduated cylinders can only record a significant value to one decimal place, such as: Generally, no estimation is required.

Summary. The relationship between the accuracy of the graduated cylinder and the absolute error of its measurement is: the minimum scale of the measuring instrument is required to be greater than or equal to twice the maximum allowable error (accuracy = the range of the large allowable error range * 100%).

So conversely, the finer the minimum scale, the higher the measurement accuracy.

The relationship between the accuracy of the graduated cylinder and the absolute error of its measurement is: the minimum scale of the measuring instrument is required to be greater than or equal to twice the maximum allowable error (accuracy = the range of the large allowable error range * 100%). So conversely, the finer the minimum scale, the higher the measurement accuracy.

Related information: For graduated cylinder measuring instruments, the finer the pipe diameter, the smaller the human error that may be introduced in the operation process (such as the reading error caused by the tilt of the graduated cylinder), and it is easier to operate accurately under the same minimum scale, not the accuracy of the instrument itself. In the case of the same measurement range, the finer the pipe diameter, the easier it is to make the accuracy of the instrument.

1.The accuracy of the graduated cylinder is ml, milliliter.

The specifications of the graduated cylinder are expressed in the maximum capacity (ml) of the energy capacity, and the commonly used ones are 10 ml, 25 ml, 50 ml, 100 ml, 250 ml, 500 ml, 1000 ml, etc. The scales on the outer wall are in ml, with a 10 ml cylinder representing ml per compartment and a 50 mL cylinder representing 1 mL per compartment.

2.What is a graduated cylinder: A graduated cylinder is a glass instrument commonly used in biological laboratories to roughly measure the volume of liquids, and there is a scale on the outer wall.

The specifications of commonly used graduated cylinders are 5ml, 10ml, 20ml, 25ml, 50ml, looml, 200ml, etc.

3.When using the Calendar Celebrity, you should pay attention to the following.

Measuring the volume of liquid with a graduated cylinder is a rough measurement method, so the appropriate specifications must be selected in use, do not use a large measuring cylinder to measure a small volume, and do not use a small measuring cylinder to measure a large volume of liquid many times, otherwise it will cause a large error. A graduated cylinder weighing slightly larger than the volume of liquid taken should be selected.

The accuracy of the measuring cylinder is affected by the size of the inner diameter, the larger the measuring cylinder, the larger the inner diameter, and the smaller the change of the concave liquid level of each drop of liquid, which is an important reason for the inaccuracy of the coarse measuring instrument: for example, the measuring cup is much worse than the measuring cylinder of the same scale, and the upper end of the volumetric limb posture bottle is made into a thin neck, and the scale part of the pipette is very thin in order to increase the accuracy of the instrument. <>

The accuracy of a graduated cylinder depends on the spacing of its tick marks and the build quality of the instrument. Typically, graduated cylinders are graduated with a 1 ml or milliliter spacing between the positive and thick lines, and the build quality can cause some dust removal errors. Therefore, when using a graduated cylinder for measurement, you should take note of:

1.Minimum readability: Depending on the scale mark spacing of the graduated cylinder, the minimum readable value is 1 ml or milliliter, and the measurement result should be within this range.

2.Reading error: Due to human vision and reaction time constraints, the reading error is usually around milliliters, which is 10% of the minimum readable.

3.Environmental influences: Environmental factors such as temperature and pressure can affect the measurement results of the graduated cylinder, so these effects should be taken into account when using the measuring cylinder.

Overall, with the right technique and the right graduated cylinder, a relatively high degree of accuracy can be obtained.