Balanced and Unbalanced Chemical Equation


 
 
Concept Explanation
 

Balanced and Unbalanced Chemical Equation

Balancing an Equation

1)    Count the number of atoms of each element on the both sides of equations for example. Magnesium burns in oxygen to give magnesium oxide.

Mg + O_2 rightarrow MgO

Element

No. of atoms in LHS

No. of atoms in RHS

Mg

1

1

O

2

1

2. To balance oxygen on both sides, multiply RHS by 2 i.e.

Mg + O_2 rightarrow 2MgO

3. Now oxygen atom is balanced but number of magnesium atom is not therefore multiply on the LHS by 2.

.... (More Text Available, Login?)
Sample Questions
(More Questions for each concept available in Login)
Question : 1

Consider reaction: large Na(s) + O_2(g) rightarrow Na_2O. Number of molecules of oxygen needed to balance equation are  :

Right Option : A
View Explanation
Explanation
Question : 2

 Chemical equations can be made more ____________________ if we use chemical formulae of reactants and products instead of words.

Right Option : C
View Explanation
Explanation
Question : 3

Which of the following is a balanced chemical equation for the following word-equation? Sodium + water  rightarrow Sodium hydroxide + hydrogen

Right Option : B
View Explanation
Explanation
 
 
Related Videos
Language - English
Language - English

Language - English
Language - English
Language - English

Language - English


Students / Parents Reviews [10]