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Lesson Posted on 21 May Learn Mathematics
Sonal Gupta
Hello Learners! I am Sonal. I am MBA | B.ED having 15yrs of exp. as Math Educator. I am in ed-tech Industry...
Lesson Posted on 19 May Learn Science
Shilpa
Greetings, young scholars and aspiring scientists! I am delighted to introduce myself as your dedicated...
Types of Chemical Reactions
When two or more substances combine to form a single product, the reaction is known as a combination reaction.
For example:
In the laboratory, iron sulphide is prepared by mixing iron and sulphur.
Fe(s) + S(s) → FeS(s)
Formation of slaked lime by the reaction of calcium oxide with water
A chemical reaction in which a single compound splits into two or more simple substances is called a decomposition reaction.
Correct way of heating the boiling tube containing crystals of ferrous sulphate and of smelling the odour
For example:
When mercuric oxide is heated in a crucible, the orange-red powder begins to darken and a silver mirror begins to deposit on the cooler parts of the crucible.
Reactions in which the more reactive element displaces the less reactive element from its compound are called displacement reactions.
Iron nails dipped in copper sulphate solution
For example:
Zinc displaces copper in copper sulphate to form zinc sulphate.
Reactions in which ions of the reactants exchange places to form two new compounds, are called double displacement reactions.
For example: Sodium hydroxide reacts with hydrochloric acid to form sodium chloride and water.
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
Types of Double Displacement Reactions:
In all of the following processes, a white material is generated that is insoluble in water. A precipitate is the insoluble substance that forms. A precipitation reaction is a reaction that results in the formation of a precipitate.
The reactants are a base and an acid, and the products are salt and water. Neutralization is a form of double displacement reaction in which the reactants are a base and an acid, and the products are salt and water. The positive charge of the acid's hydrogen ion and the negative charge of the base's hydroxyl ions or oxide ions lose their electrical charge and form covalent water molecules.
Na+OH- + H+Cl- → Na+Cl- + H2O
Base Acid Salt Water
Zn2+O2- + 2H+NO3- → Zn2+(NO3)2- + H2O
A neutralization reaction is basically a reaction between H+ and OHions i.e.,
H+(aq) + OH-(aq) → H2O(l)
Reactions which involve the addition of oxygen, or the removal of hydrogen are called oxidation reactions. For example:
Zinc displaces copper in copper sulphate to form zinc sulphate.
Reactions in which ions of the reactants exchange places to form two new compounds, are called double displacement reactions.
For example: Sodium hydroxide reacts with hydrochloric acid to form sodium chloride and water.
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
Types of Double Displacement Reactions:
In all of the following processes, a white material is generated that is insoluble in water. A precipitate is the insoluble substance that forms. A precipitation reaction is a reaction that results in the formation of a precipitate.
The reactants are a base and an acid, and the products are salt and water. Neutralization is a form of double displacement reaction in which the reactants are a base and an acid, and the products are salt and water. The positive charge of the acid's hydrogen ion and the negative charge of the base's hydroxyl ions or oxide ions lose their electrical charge and form covalent water molecules.
Na+OH- + H+Cl- → Na+Cl- + H2O
Base Acid Salt Water
Zn2+O2- + 2H+NO3- → Zn2+(NO3)2- + H2O
A neutralization reaction is basically a reaction between H+ and OHions i.e.,
H+(aq) + OH-(aq) → H2O(l)
Reactions which involve the addition of oxygen, or the removal of hydrogen are called oxidation reactions. For example:
C(s) + 2H2 (g) → CH4 (g)
Chemical reactions in which the reactants gain hydrogen are reduction reactions. For example:
The chemical reaction in which oxidation and reduction takes places simultaneously is known as a redox reaction.
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Answered on 16 Apr Learn Class 10
Reshma Ann Thomas
Unlocking the world of Social Science from Grade 1 to Degree by an Economics Enthusiast and Educator
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Lesson Posted on 11 May Learn Tenses
The Science of Physics Chapter 1
Sood Academy
I can teach every topic very easily and make it stronger for the students.
Chapter Overview
Lesson Posted on 29 Apr Learn Mathematics
Algebra Basics - The Product of algebraic expressions
Deeksha
I have approximately 3 years of experience of teaching Mathematics across different boards including...
Lesson Posted on 21 Apr Learn Mathematics
Abhishek Sharma
I am a civil engineer graduate currently teaching Mathematics in Cambridge board in Ahmedabad. My key...
Classes explore different scenarios using manipulatives to learn about the difference between independent and dependent probability. Learners experiment with colored chips to model the two types of probabilities. To test their understanding, individuals sort independent and dependent probabilities into like groups.
Real Life Context The following examples could be used to explore real life contexts.
Looking at statistics from the Census, questions like:
• How long will I live?
• Will I get married?
• How many children will I have? These questions can be answered with some degree of certainty based on population statistics. Life assurance companies work out how much to charge for their premiums based on tables of life expectancy. Why are some premiums cheaper than others?
The following examples could be used to explore misconceptions:
• What is the most difficult number to get when throwing a fair die?
• Random events should have outcomes which appear random; for example, in the lotto theory tells us that any of the six numbers is equally likely to turn up, yet more people choose randomly spaced numbers than numbers which form a pattern like 1,2,3,4,5,6 etc.
• The likelihood of 2 consecutive numbers appearing in any Lotto draw (which is > 50%) could easily be investigated by reference to a number of recent draws.
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Answered on 26 Apr Learn CBSE Class 10 English First Flight Chapters
Deepika Agrawal
"Balancing minds, one ledger at a time." "Counting on expertise to balance your knowledge."
Timber traces back to an Old English word initially meaning “house” or “building” that also came to mean “building material,” “wood,” and “trees” or “woods.” The trees are chopped down so that their wood could be put to use. The logs and wood, timber, are used for carpentry and to make furniture
read lessAnswered on 29 Apr Learn Areas related to circles
Aniruddha Singh
PCM sream in 11 , Preparing for JEE
154/3 cm2
EXPLANATION:-
Answered on 29 Apr Learn Areas related to circles
Aniruddha Singh
PCM sream in 11 , Preparing for JEE
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Answered on 28 Apr Learn Chemistry
Deepika Agrawal
"Balancing minds, one ledger at a time." "Counting on expertise to balance your knowledge."
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