The equation is balanced after a final check of atom and charge balance.
H2O is produced by hydrogen peroxide in acidic solution.
A balanced equation is needed for this reaction.
By the end of this section, you will be able to: Chemical formulas give the identities of the reactants and products involved in the chemical change.
A quantitative assessment of the relationships between the amounts of substances consumed and produced by the reaction can be made using coefficients.
The use of balanced chemical equations is explored in this module.
The way people go about many activities is similar to the way the general approach is used.
Food preparation can offer an appropriate comparison.
A recipe for eight pancakes calls for 1 cup pancake mix, 34 cup milk, and one egg.
If two dozen pancakes are needed for a big family breakfast, the ingredient amounts must be increased proportionally according to the recipe.
Balanced chemical equations are used to determine the amount of one reactant required to react with a given amount of another reactant, or to yield a given amount.
The number of ammonia molecule produced from a given number of hydrogen molecule or the number of hydrogen molecule required to produce a given number of ammonia molecule can be calculated using these factors.
Similar factors can be derived for any pair of substances.
There is a reaction to produce aluminum iodide.
The heat of the reaction causes some of the solid iodine to be purple.
The two substances of interest are 3 mol I2 2 mol Al.
The approach is the same, though the number of moles of the molecule is not requested.
The moles-to-numbers conversion factor will be used.
The amount of substances involved in a chemical reaction may be related to these examples.
It's not easy to directly measure the numbers of atoms and molecules, and the more readily measured property of mass is required in the practical application of stoichiometry.
Additional steps of the sort learned in the previous chapter are required in this case.
The approach required here is the same as for the different approach only that the provided and requested mass are for reactant species.
These examples show a few instances of calculation.
Depending on what quantities are provided and sought, there are many variations on the beginning and ending computational steps.
Regardless of the details, all of these calculations share a common essential component.
Computational steps are depicted in the flowchart.
Since the 1990s, most automobiles have safety features such as absorbers.
When a vehicle is involved in a collision, an appropriate amount of gas needs to be quickly inflated to the correct level.
The requirement is satisfied through the use of explosives and the decomposition of NaN3 is a common choice.