In the past, measurement in chemistry was important for scientists, now it has become essential for the effectiveness of their studies. A good measurement is a guarantee of obtaining a reliable result in the study with correct conclusions. If you want to have more information about the measurements continue reading the article.
- History of measurements in chemistry
- What are measurements in chemistry?
- Importance of education in chemistry
- What are the most commonly used units of measurement in the chemistry?
- The most commonly used units in chemistry measurements
- Characteristics of an instrument for measurements in chemistry
History of measurements in chemistry
Measurement in chemistry a long time ago measuring was a headache, they used the measurement of the hand to measure distances. With the height of the waist, with steps in the yard, the problem arose because all human beings have hands, feet of the same size. The need of man to have accuracy in measurement is strengthened.
That is, in the French Revolution of 1789, this type of measurement was carried out. The French in full of excitement, on the other hand, decided that they had to found a measurement system. That it was superior to all those that already existed. The French national assembly entrusted the academy of sciences with creating a new system and had to comply with:
That its basis was that everything remained stable in nature. Adjusted to few ways of measuring, which will link with each other. It should be a decimal system, where the multiples will vary from 10 to 10.
First measurement concept
The first concept of measurement as such was that of the number, in order to express with numbers everything around. They established mass comparisons according to the muscles, distance was measured in relation to time. According to the distance traveled on foot in a day, etc. When you start to establish business relationships, conflicts also begin.
Because the units varied from individual to individual and from place to place. This is how mathematics and therefore measurements originate.
What are measurements in chemistry?
Measurement is conceived as the way to make the description of something. Referring to the size, shape, extension of an object, body, material or substance. It is the action or effect of measuring. From the term metíri, which means, to compare in relation to its respective unit. To make a measurement it is necessary to determine the dimension of the object.
Substance with a certain unit of measurement. The possibility of measurement lies in the fact that the dimension of the object, body, substance and the unit of measurement must be the same magnitude. It can be indirect or direct. Direct, mass, time, amplitude. Measurement is the approximation to the value of the measured quantity.
It should contain the numerical value, uncertainty and unity. It is the result of the measurement. They are often used in calculations. There are various instruments with which substances are measured. With the flask, the burette, the graduated cylinder and the pipette volumes are measured in volumetry.
The use of the balance to measure the mass and with the thermometer the temperature. These properties are measured directly and indirectly would be at the atomic, molecular level. The measured quantity must be accompanied by the appropriate unit 18 Km, necessary to adequately express the measurements.
Importance of education in chemistry
Measurements in chemistry are important because in the current era where mass production is important to meet the needs. It offers accuracy, precision in the manufacture of different equipment, in different parts with the same measurements. Important for the development of trade, industry, science. In the relationships of man, as they are part of daily life.
Of vital importance in the production, distribution and research. The measuring instrument(s) is essential in experimentation, because they are precise, accurate and of high sensitivity. Which allows the hypothesis, research conclusions to be correct. That the experience can be repeated anywhere in the world.
They provide a form of control. It offers the means to control the parts that are made for others. It's a way of describing a part. They are fundamental in practice with substrates in all professions. It allows to know in a quantitative way the physical and chemical properties of objects.
What are the most commonly used units of measurement in the
The scientists made the invention of the measurements in metric units, related in decimal form, in power of 10. In 1960 the updated international metric system (IMS) was proposed. These contemplate seven basic units which are: length, meter (m). The mass, the kilogram (Kg). The time, in seconds (Sec). The electric current, ampere (A). Temperature, in kelvin (K). In the amount of substance, the mole (mol).
The most commonly used units in chemistry measurements
Measurements in chemistry are used continuously for the analysis of substances, bodies, objects. In the study of chemistry are: time, temperature, volume, mass, density. The time, to measure the time in seconds (Sec). The mass, to measure mass, the unit is the kilogram (Kg), in chemistry the gram (gr) is used.
The volume, measures volumes in cubic meters (Mts3), in chemistry the cubic centimeter (Cm3) or cubic decimeter (dm3) is used. The density, measure the density in (Kg/Mt3). The temperature, to measure temperature in degrees °K, °C, °F, in chemistry ° C and ° F are used.
Characteristics of an instrument for measurements in chemistry
Measurement in chemistry has to be observed at sensitivity when variation the marker is adjusted to the correct measurement. The accuracy, must give the same measure on all occasions and conditions. Precision, when it has small interior divisions that measure magnitudes less than unity. Speed is when the measurement is simpler, the measurement is faster.
In length, the caliber is a ruler graduated in millimeters, the micrometer is the screw that measures the thickness. In the dough, the balance of two plates, the digital one. For the volume of liquid. Graduated cylinder, burette, volumetric flask. Time, is measured with the stopwatch is a clock to measure the time between two points. The electric current, detect small amounts of current.
Measurements in chemistry are a fundamental part of experimentation, hence the importance of it in everyday life. I hope you have found the information you needed, I invite you to review this article every time you need it.
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