[Chemistry Class Notes] on Using a Chemical Balance Pdf for Exam

Chemical balance is a beam balance instrument that is used in a quantitative measure of the chemical with great precision. It measures the mass of the chemical up to four decimal places. It is used in the quantitative analysis of the chemical. It has the ability to recognise any minimal deviation. 

Chemical Balance Diagram

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Weighing Balance Principle

The weighing balance principle works on electromagnetic force restoration (EMFR). The principle of the beam balance is comparable to the weighing balance principle. On the one side weight is laid, known as the coil arm. The coil arm is attached to the other arm of the weighing balance. It tries to move out of the electromagnetic force of the magnetic field. This is the basis of the rapid and accurate measurement of the weighing balance. High current is passed through the coil with the help of the electrical regulator. This high voltage current helps in keeping the weighing balance in a neutral position.

Weighing Balance Diagram

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Weighing Balance Uses

Weighing balance is used in the Pharmaceutical industry.

It is used in the food industry.

Weighing balance is used in the chemical industries.

Due to their high accuracy, weighing balance is used in various laboratories like biology laboratories, chemistry laboratories, physics laboratories.

Different Types of Balance

Analytical Balance

Spring Balance

Micro Balance

Carat Balance

Physical Balance Diagram

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In the above physical balance diagram, an instrument is shown that is used to measure the gravitational mass of the substance. The physical balance diagram shows that it works on the basis of the moment of equilibrium. The anticlockwise moment caused by the weight balances the clockwise moment of the standard weight.

Analytical Balance 

An analytical balance is an instrument generally used to measure the small amounts of masses of the substance. This instrument has a calibration adjustment for the minimization of the gravitational errors during the quantitative analysis. Let’s discuss the analytical balance diagram.

Analytical Balance Diagram  

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The analytical balance diagram shows the measuring pan located inside the transparent glass. These transparent doors prevent the entry of dust inside the chamber. It also minimises the effect of the air while measuring the mass of the chemical. The covered part is called a draft shield.

Analytical Balance Uses

An analytical balance is used to measure the mass of the substances in the laboratories.

An analytical balance is used in the quantitative analysis of the liquid, powder or granular substances.

It is used for the preparation of the standard solutions in the chemical laboratory.

It is used to measure the weighing of the biomass of the small plants part in the biology laboratories.

Factors that Affect the Readings of these Balances

Some of the most common factors that tend to affect the reading on analytical balances are as follows: 

 

Fractional Weight Box

A fractional weight box is a box that contains the tools required for the measurement like rider, forceps, and standard weight ranging in grams and milligrams. It is used in various laboratories for the accurate measurement of weight. A fractional weight box is generally available in the form of aluminium, wood, and plastic. The standard weights inside the box are generally made up of copper or aluminium.

Fractional Weight Box Image

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Did You Know?

The earliest weighing balance was made up of wood and used bronze masses.

The first mass measuring instrument invented was beam balance.

Instruments or equipment that have a pendulum-type scale do not use spring.

Beam balance is a type of balance that consists of a lever with two arms of equal size and a pan suspended on each arm.