Question

Consider the following generic chemical equation.

Answer 1

Answer:

$\fbox{ A) A \: is \: limiting \: reactant }$

$\fbox{ B) B \: is \: limiting \: reactant }$

$\fbox{ C) A \: is \: limiting \: reactant }$

$\fbox{ D) A \: is \: limiting \: reactant }$

Explanation:

Given equation:

$A+3B \rightarrow \: C$

To find:

Limiting reactant for corresponding number of moles=?

Solution:

We know that the liming reactant is any atom, ion or molecule which is completely consumed during a reaction and other reactant is still left in reactant vessel.

For the given reaction A+3B→C

for every one mole of A three moles of B are required.

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in A) there is one mole of A and 4 mole of B,

if 1 mole of A will react with 3 moles of B, 1 mole of B will be still there in reaction, the reactant was completely consumed is A which is limiting reactant.

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in B) there is 2 mole of A and 3 mole of B,

if 1 mole of A will react with 3 moles of B, 1 mole of A will be still there in reaction, the reactant was completely consumed is B which is limiting reactant.

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in C) there is 0.5 mole of A and 1.6 mole of B

if one mole of A requires three moles of B to complete the reaction then,

0.5 moles of A will require 1.5 moles of B

if 0.5 mole of A will react with 1.6 moles of B, 0.1 mole of B will be still there in reaction, the reactant was completely consumed is A which is limiting reactant.

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in D) there is 24 mole of A and 72 mole of B

if one mole of A requires three moles of B to complete the reaction then,

24 moles of A will require 72 moles of B.

if 24 mole of A will react with 75 moles of B, 3 mole of B will be left over in reaction, the reactant was completely consumed is A which is limiting reactant.

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$\fbox{ A) A \: is \: limiting \: reactant }$

$\fbox{ B) B \: is \: limiting \: reactant }$

$\fbox{ C) A \: is \: limiting \: reactant }$

$\fbox{ D) A \: is \: limiting \: reactant }$

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