Name: Stoichiometry
Uploaded: 2019-07-19
Duration: 10 min 8 s
Description: Watch this video to learn the calculations of reactants or products with the help of a balanced chemical equation. It is termed stoichiometry.

Question

Write balanced equation for hexane,

C_{6} H_{14}

, burns in oxygen to form carbon dioxide and water.

Accepted Answer

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction same for both the reactants and the products. This also called stoichiometric equation.
The following are the steps involving in the balancing chemical reaction,

First we have to write formulas for reactants and products

$C_{6} H_{14} + O_{2} \to {CO}_{2} + H_{2} O$

Need to count the number of atoms in each reactant and product

$C_{6} H_{14} + O_{2} \to {CO}_{2} + H_{2} O$

$6 [C] 2 [O] 1 [C] 2 [H] 14 [H] 2 [O] 1 [O]$

Finally, we have to balance the atoms one at a time until finishing all the atoms, in equations involving organic combustion reactions balance the carbon first and then hydrogen and, balance the oxygen last.

Balancing the carbon

$C_{6} H_{14} + O_{2} \to 6 {CO}_{2} + H_{2} O$

$6 [C] 2 [O] 6 [C] 2 [H] 14 [H] 12 [O] 1 [O]$

Balancing the hydrogen

$C_{6} H_{14} + O_{2} \to 6 {CO}_{2} + 7 H_{2} O$

$6 [C] 2 [O] 6 [C] 14 [H] 14 [H] 12 [O] 7 [O]$

Balancing oxygen

$2 C_{6} H_{14} + 19 O_{2} \to 12 {CO}_{2} + 14 H_{2} O$

$12 [C] 38 [O] 12 [C] 28 [H] 28 [H] 24 [O] 14 [O]$

Trail and errors involved here as carbon and hydrogen are also needed to be balanced.

So finally the balanced equation for hexane, $C_{6} H_{14}$ burns in oxygen to form carbon dioxide and water is,

$2 C_{6} H_{14} + 19 O_{2} \to 12 {CO}_{2} + 14 H_{2} O$

Write balanced equation for hexane, $C_{6} H_{14}$ , burns in oxygen to form carbon dioxide and water.

Important Questions on Atoms, Molecules and Stoichiometry

Learn and Prepare for any exam you want !

Write balanced equation for hexane, C6H14, burns in oxygen to form carbon dioxide and water.

Important Questions on Atoms, Molecules and Stoichiometry

Learn and Prepare for any exam you want !

Write balanced equation for hexane, $C_{6} H_{14}$ , burns in oxygen to form carbon dioxide and water.