top of page

Grupo de Matrimonios

Público·75 miembros

PDF Download of Class 10 Chemistry Notes for Chemical Reactions and Equations


Class 10 Chemistry Chapter 1 Notes PDF Download




Chemistry is the study of matter and its transformations. It is a fascinating subject that helps us understand the world around us. In this article, we will learn about the basics of chemical reactions and equations, which are the core concepts of chemistry. We will also provide you with a link to download the class 10 chemistry chapter 1 notes in PDF format for your convenience.


Introduction




A chemical reaction is a process in which one or more substances (called reactants) are converted into one or more new substances (called products). The reactants and products are represented by chemical formulae, which show the symbols and numbers of atoms of each element present in a compound. A chemical equation is a way of writing a chemical reaction using symbols and formulae. It shows the reactants and products, as well as the physical states, conditions, and coefficients (numbers that indicate the relative amounts) of each substance involved in the reaction.




class 10 chemistry chapter 1 notes pdf download



What is a chemical reaction?




A chemical reaction occurs when the atoms or molecules of the reactants rearrange themselves to form new combinations with different properties. For example, when hydrogen gas (H2) and oxygen gas (O2) react, they form water (H2O), which has different physical and chemical properties than the reactants. A chemical reaction can be observed by changes such as:


  • Change in state (solid, liquid, gas)



  • Change in colour



  • Change in temperature



  • Evolution or absorption of gas



  • Formation of a precipitate (a solid that settles out of a solution)



However, not all changes are due to chemical reactions. Some changes are physical changes, which do not alter the identity or composition of the substance. For example, when ice melts into water, it changes its state from solid to liquid, but it is still water. A physical change can be reversed by changing the conditions, such as temperature or pressure. A chemical change cannot be reversed by simple physical means.


Types of chemical reactions




There are many types of chemical reactions, depending on how the atoms or molecules of the reactants rearrange themselves to form products. Some common types of chemical reactions are:


Combination reactions




A combination reaction is a type of chemical reaction in which two or more substances combine to form a single product. For example,


A + B AB


An example of a combination reaction is the synthesis of ammonia (NH3) from nitrogen gas (N2) and hydrogen gas (H2):


N2(g) + 3H2(g) 2NH3(g)


Decomposition reactions




A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. For example,


class 10 chemistry chapter 1 chemical reactions and equations notes pdf


class 10 chemistry chapter 1 notes pdf free download


class 10 chemistry chapter 1 notes pdf cbse


class 10 chemistry chapter 1 notes pdf ncert


class 10 chemistry chapter 1 notes pdf in hindi


class 10 chemistry chapter 1 notes pdf in english


class 10 chemistry chapter 1 notes pdf punjab board


class 10 chemistry chapter 1 notes pdf kerala board


class 10 chemistry chapter 1 notes pdf maharashtra board


class 10 chemistry chapter 1 notes pdf icse


class 10 chemistry chapter 1 revision notes pdf


class 10 chemistry chapter 1 important questions and answers pdf


class 10 chemistry chapter 1 mcq questions with answers pdf


class 10 chemistry chapter 1 extra questions and answers pdf


class 10 chemistry chapter 1 numericals with solutions pdf


class 10 chemistry chapter 1 worksheets with answers pdf


class 10 chemistry chapter 1 ppt slides download pdf


class 10 chemistry chapter 1 mind maps download pdf


class 10 chemistry chapter 1 summary download pdf


class 10 chemistry chapter 1 formulae download pdf


class 10 chemistry chapter 1 solved examples download pdf


class 10 chemistry chapter 1 previous year question papers download pdf


class 10 chemistry chapter 1 sample papers download pdf


class 10 chemistry chapter 1 mock tests download pdf


class 10 chemistry chapter 1 online quizzes download pdf


class 10 chemistry chapter 1 video lectures download pdf


class 10 chemistry chapter 1 study material download pdf


class 10 chemistry chapter 1 reference books download pdf


class 10 chemistry chapter 1 guide download pdf


class 10 chemistry chapter 1 solutions download pdf


how to prepare for class 10 chemistry chapter 1 exam download pdf


tips and tricks for class 10 chemistry chapter 1 exam download pdf


best resources for class 10 chemistry chapter 1 exam download pdf


syllabus and weightage of class 10 chemistry chapter 1 exam download pdf


marking scheme and blueprint of class 10 chemistry chapter 1 exam download pdf


important topics and concepts of class 10 chemistry chapter 1 exam download pdf


common mistakes and errors of class 10 chemistry chapter 1 exam download pdf


dos and don'ts of class 10 chemistry chapter 1 exam download pdf


easy and hard questions of class 10 chemistry chapter 1 exam download pdf


expected questions and answers of class


AB A + B


An example of a decomposition reaction is the electrolysis of water (H2O) into hydrogen gas (H2) and oxygen gas (O2):


2H2O(l) 2H(g) + O2(g)


Displacement reactions




A displacement reaction is a type of chemical reaction in which an element displaces another element from a compound. For example,


A + BC AC + B


An example of a displacement reaction is the reaction of zinc metal (Zn) with copper sulfate solution (CuSO4), in which zinc displaces copper from the compound and forms zinc sulfate solution (ZnSO4) and copper metal (Cu):


Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s)


Double displacement reactions




A double displacement reaction is a type of chemical reaction in which two compounds exchange their ions or atoms to form two new compounds. For example,


AB + CD AD + CB


An example of a double displacement reaction is the reaction of sodium chloride solution (NaCl) with silver nitrate solution (AgNO3), in which sodium and silver exchange their ions and form sodium nitrate solution (NaNO3) and silver chloride precipitate (AgCl):


NaCl(aq) + AgNO3(aq) NaNO3(aq) + AgCl(s)


Oxidation and reduction reactions




Oxidation and reduction are two complementary processes that occur in many chemical reactions. Oxidation is the loss of electrons or increase in oxidation number, while reduction is the gain of electrons or decrease in oxidation number. For example,


Zn(s) + Cu(aq) Zn(aq) + Cu(s)


In this reaction, zinc loses two electrons and increases its oxidation number from 0 to 2, so it is oxidized. Copper gains two electrons and decreases its oxidation number from 2 to 0, so it is reduced. The substance that causes oxidation is called the oxidizing agent, while the substance that causes reduction is called the reducing agent. In this case, copper is the oxidizing agent and zinc is the reducing agent.


How to write and balance chemical equations




To write a chemical equation, we need to know the symbols and formulae of the reactants and products, as well as the physical states, conditions, and coefficients of each substance involved in the reaction. Here are some steps to follow:


Symbols and formulae of reactants and products




We need to identify the symbols of the elements and the formulae of the compounds involved in the reaction. For example, if we want to write the equation for the combustion of methane gas (CH4) in oxygen gas (O2) to produce carbon dioxide gas (CO2) and water vapour (H2O), we need to know that:


  • The symbol for carbon is C, hydrogen is H, oxygen is O.



  • The formula for methane is CH4, oxygen is O2, carbon dioxide is CO2, water is H2O.



  • The physical state of methane and oxygen is gas, denoted by (g), carbon dioxide and water are also gas, denoted by (g).



  • The condition for the combustion is heat, denoted by Δ.



  • The arrow indicates the direction of the reaction, from left to right.



The equation can be written as:


CH4(g) + O2(g) Δ CO2(g) + H2O(g)


Law of conservation of mass




We need to balance the equation according to the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. This means that the total mass of the reactants must be equal to the total mass of the products, or equivalently, the number of atoms of each element must be equal on both sides of the equation. For example, in the equation above, we can see that there are one carbon atom and four hydrogen atoms on the left side, but one carbon atom and two hydrogen atoms on the right side. This means that the equation is not balanced. To balance the equation, we need to adjust the coefficients of the reactants and products, such that the number of atoms of each element is equal on both sides. For example, we


Acerca de

Welcome to the group! You can connect with other members, ge...

Miembros

bottom of page