Difference between revisions of "Empirical Formula"
| Line 4: | Line 4: | ||
===About Empirical Formulae=== | ===About Empirical Formulae=== | ||
| − | + | The '''empirical formula''' of a [[compound]] may not be the same as the [[Chemical Formula|chemical formula]]: | |
*Ethane - [[Chemical Formula]]: C<sub>2</sub>H<sub>6</sub> '''Empirical Formula''': CH<sub>3</sub> | *Ethane - [[Chemical Formula]]: C<sub>2</sub>H<sub>6</sub> '''Empirical Formula''': CH<sub>3</sub> | ||
*Ethene - [[Chemical Formula]]: C<sub>2</sub>H<sub>4</sub> '''Empirical Formula''': CH<sub>2</sub> | *Ethene - [[Chemical Formula]]: C<sub>2</sub>H<sub>4</sub> '''Empirical Formula''': CH<sub>2</sub> | ||
: '''Empirical formulae''' are calculated from the amount of [[atom]]s in a [[Chemical Reaction|chemical reaction]]. | : '''Empirical formulae''' are calculated from the amount of [[atom]]s in a [[Chemical Reaction|chemical reaction]]. | ||
: The number of [[atom]]s can be found if you know the [[mass]] of different [[element]]s and the [[Relative Atomic Mass|relative atomic mass]] of the [[element]]s in the [[Chemical Reaction|reaction]]. | : The number of [[atom]]s can be found if you know the [[mass]] of different [[element]]s and the [[Relative Atomic Mass|relative atomic mass]] of the [[element]]s in the [[Chemical Reaction|reaction]]. | ||
Revision as of 15:46, 2 January 2019
Key Stage 4
Meaning
An empirical formula is the simplest ratio of the different types of atom in a compound.
About Empirical Formulae
The empirical formula of a compound may not be the same as the chemical formula:
- Ethane - Chemical Formula: C2H6 Empirical Formula: CH3
- Ethene - Chemical Formula: C2H4 Empirical Formula: CH2
- Empirical formulae are calculated from the amount of atoms in a chemical reaction.
- The number of atoms can be found if you know the mass of different elements and the relative atomic mass of the elements in the reaction.