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chemical calculation steps

The steps of chemical calculations are of great importance. When writing a balanced chemical equation, a cookie recipe looks like a chocolate chip cookie, it shows the reactants (ingredients) that combine to form the products (cookies), and it also shows the numerical relationships between the reactants and products (eg the number of cups The exact required to make one batch of cookies), this is called chemical mathematics (chemical calculations), and through the reference site today we will highlight to you everything related to this topic.




The concept of chemical calculations

When the reaction is first performed little is known about the microscopic nature of the products, so it is necessary to empirically determine the composition and formula of a newly synthesized substance.

About this data as percentage composition, chemical equations are symbolic representations of chemical and physical changes, formulas of substances subject to change (reactants), and substances subject to change (reaction products).


Balanced equations are equations whose coefficients result in equal numbers of atoms for each element in the reactants and products A balanced chemical equation can be used to describe the stoichiometry (relations between quantities of reactants and products), and the coefficients from the equation are used to derive stoichiometric factors that can later be used for related calculations material blocks.


chemical calculation steps

To get a correct chemical equation, it is necessary to know how to write a chemical equation, and this is done by following the following main steps:

  1. Write a linear equation for the chemical reaction: that is, the equation is written in text For example Water is produced from the interaction of two hydrogen atoms and an oxygen atom, two atoms 
  2. Convert the linear equation into symbols: You will then write the unbalanced equation using the correct chemical symbols for all the reactants and products For example: For the previous equation, hydrogen has the symbol H and the oxygen element has the symbol O, so you write the equation H2O → H2 + O2
  3. Balance the equation by checking: the goal of balancing the equation is equivalent to both sides, that is, the number of atoms of the equation entering must be equal to the number of atoms of the equation after the interaction, in a more precise sense, you must make sure that the same number of each type of atom appears on both sides of the equation, for example balancing an equation Water is: 2H2O → 2H2 + O2.
  4. Write the state symbol after each chemical symbol: this is done by using the symbols assigned to each element or reaction symbol such as heat for example: + is used to separate one reactant or product from another.


Benefits of chemical calculations

After identifying the steps of chemical calculations, it is necessary to know that the chemical equation gives you the basic information about a chemical reaction. Here are the most prominent benefits of chemical calculations:


Contribute to understanding the nature of the reactants

Chemical equations contribute to understanding the nature of the chemicals that interact together and form an equation that makes it easier for the information recipient to understand the resulting chemicals more, in a more precise sense, that helps analyze the equation into symbols that make it easier for the recipient of information to understand the nature of each substance separately.


It helps to know the quantities of reactants and products

A chemical equation helps to know the physical state of the reactants and products (eg solid, liquid, gas, and aqueous), when reactions are carried out using less than stoichiometric amounts of reactants, the amount of product produced will be determined by the specific reactant, and the amount of product produced by the reaction A chemical is its actual yield, which is often less than the amount of product predicted by the stoichiometry of the balanced chemical equation representing the reaction (the theoretical yield), and the extent to which the reaction generates the theoretical amount is expressed as a percentage of the yield.


It helps to measure the chemical elements of the reaction

A balanced chemical equation can be used to describe the stoichiometry (relations between quantities of reactants and products), coefficients from the equation are used to derive stoichiometric factors that can later be used for calculations regarding masses of reactants and products, molar amounts, and other quantitative properties.


The chemical equation contributes to determining the exact mass percentage of a solution

To accurately determine a solution we need to determine its concentration: the amount of solute in a given amount of solvent. Words like dilute or concentrated are used to describe solutions that contain little or a lot of solutes dissolved in a row but these are relative terms whose meanings depend on different factors, mass ratio is defined It is the mass of the solute divided by the mass of the solution multiplied by 100.


balancing chemical accounts

Usually, you balance the H (hydrogen) atoms first, followed by the O (oxygen) atoms, than any other atoms. Here are the most important things you should consider when balancing a chemical equation:

  1. You have to start by balancing the more complex molecule.
  2. Never change the chemical symbol of a substance, neither the symbols in the reactant chemical symbols nor even the resulting symbols.
  3. Multiply the number in front of the formula by each symbol that follows it.


To perform chemical calculations, we must find the symbolic equation

To perform the chemical calculations, we must find the symbolic equation or the symbolic representation of the chemical reaction, the reactants (the raw materials) that are written on the left, and the products of the chemical equation (the materials that appear after the chemical reaction) are written on the right, as for the numbers next to the entity symbols It refers to the number of moles of a substance that is produced or used in a chemical reaction.

When conducting this equation, the following must be taken into account: 

  • The coefficients next to the entity symbols indicate how many moles of a substance is produced or used in a chemical reaction.
  • The reactants and products are separated by an arrow and are usually read aloud as "crops".
  • Chemical equations must contain information about the state properties of products and reactants whether they are aqueous (dissolved in water - aq), solid (substances), liquid (liters), or even gaseous (volume).


Chemical calculations are based on

Chemical calculations depend on the law of conservation of mass, the law of conservation of mass states that atoms are not lost or made in a chemical reaction, but atoms combine with each other in different ways to form substances resulting from the reaction, for this reason in the balanced symbol equation the number of atoms of each element is the same On both sides of the equation since atoms are not made or lost in a chemical reaction, the sum of the masses of the products equals the total mass of the reactants, and the sum of the relative formula masses of the reactants equals the sum of the relative formula masses of the products.

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