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Standard XII

Chemistry

Limiting Reagent or Reactant

Consider the ...

Question

Consider the reaction:
Reaction : $A + 2 B \to C$
When, 5 moles of $A$ and 2 moles of $B$ are mixed together.
Which one is the limiting reagent?
Calculate the amount of $C$ formed.

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Solution

$A + 2 B ⟶ C$
$1$ $2$ $1$
If $5$ moles of $A$ & $2$ moles of $B$ are mixed then limiting reagent is $B$ .
(As $5$ moles of $A$ requires $10$ moles of $B$ )
with $2$ moles of $B$ only $1$ mole of $C$ is formed.

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The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction $2 A + 4 B \to 3 C + 4 D,$ when 5 moles of A react with 6 moles of B, then

(i) Which is the limiting reagent ?

(ii) Calculate the amount of C formed ?

4 moles of A are mixed with 4 moles of B, then 2 moles of C are formed at equilibrium, according to the reaction,
A + B $⇌$ C + D.
The equilibrium constant is :

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Consider the reaction:Reaction : A+2B→CWhen, 5 moles of A and 2 moles of B are mixed together.Which one is the limiting reagent?Calculate the amount of C formed.

A+2B⟶C 1 2 1If 5 moles of A & 2 moles of B are mixed then limiting reagent is B.(As 5 moles of A requires 10 moles of B)with 2 moles of B only 1 mole of C is formed.

Consider the reaction:
Reaction : $A + 2 B \to C$
When, 5 moles of $A$ and 2 moles of $B$ are mixed together.
Which one is the limiting reagent?
Calculate the amount of $C$ formed.

$A + 2 B ⟶ C$
$1$ $2$ $1$
If $5$ moles of $A$ & $2$ moles of $B$ are mixed then limiting reagent is $B$ .
(As $5$ moles of $A$ requires $10$ moles of $B$ )
with $2$ moles of $B$ only $1$ mole of $C$ is formed.