Take Class 10 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors


11/11/2022 0 0

Chemical reactions and equations :


  • Reactant + product = chemical equation
  • Reactant; The substance which undergo a chemical change  in the reaction 

Method of writing a reaction: 

  • Arrow must be placed between the reactants on Left hand side and product on the right hand side 
  • Plus sign (+) must be written between the reactants  
  • Arrow head must point towards the products which shows the direction of the reaction.

Example:  Magnesium + oxygen= magnesium oxide 


Balancing. a chemical equation

  1. First draw boxes around each formula
  2.  List the number of atoms of different elements present in unbalanced equation
  3. Start balancing with compound that contains maximum no of atoms
  4. Finally check the correctness of the balanced equation.
  5.  Write symbols of physical state 

Example: step -1

Fe+H20 →Fe3O4+ H2

Step -2 : 


 no of atoms in reactants 


Number of atoms in product (RHS)
Fe 1 3
H 2 2
O 1 4

step 3: 

3Fe+ 4H2O→Fe3O4+4H2

Step 4: 

Element  LHS RHS
Fe 3 3
H 8 8
O 4 4

Step 5: 

3Fe(s) +4H20(g)→Fe3O4(s) + 4H2(g)





0 Dislike
Follow 1

Please Enter a comment


Other Lessons for You

Class X - CBSE - Science - Chemistry - Lesson 1: Chemical Reactions and Equations
Chemical Reactions & Equations Chemical Reactions: change in colour, state, the evolution of gas, change in temperature Chemical Equation: Shorter way, concise & useful instead of using...

Vidhya T. | 02/12/2020

1 0

Chemical Reaction and Equation
How to write a Chemical Equation? Representation of a chemical reaction in terms of symbols and chemical formulae of the reactants and products is known as a chemical equation. Zn(s) + dil. H2SO4(aq)...

Vinoth | 26/05/2020

0 0

Chemical Reactions and Equation
Let us balance the following chemical equation – Fe + H2O → Fe3O4 + H2 Step I: To balance oxygen atoms, we can put coefficient ‘4’ as 4H2O Step II: Let us balance hydrogen...

Nikhil | 03/04/2018

1 0

Important Metals And Their Ores

Nikson D | 07/02/2018

0 0

Looking for Class 10 Tuition Classes?

The best tutors for Class 10 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 10 Tuition with the Best Tutors

The best Tutors for Class 10 Tuition Classes are on UrbanPro

Book a Free Demo

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more