vimwiki/sci/stoichiometry.wiki

71 lines
1.5 KiB
Plaintext
Raw Normal View History

2021-09-23 21:42:44 +00:00
= Stoichiometry =
Relationship between the relative quatnties of substances taking part in a
reaction or fomring a compund typically a ratio of whole integers
== Moles ==
Standard unit of quantity of 6.022 * 10^23
* One mole of any element has a mass in grams equal to its atomic mass
* Convert from moles to grams by multiplying number of moles by amu of that
substance
== Percentage compositon ==
weight of percent of each of the elements in a formula
{{{
(atoms in element) * (atomic weight) / (formula weight of compound) * 100%
}}}
== Empirical Formula ==
Experimentally determinded formulas representing the lowest whole number ratio
of the elements in the compound
* C,,6,,H,,6,, => CH
To find an impirical formula you need
* Elements in the compound
* % compostion
* Periodic table
== Chemical Equations ==
Shorthand that describes the chemical transformations of matter using chemical
formulas.
* A + B => C + D
* A + B
- Reactants (consumed)
* C + D
- Products (produced)
Law of conservation of mass
* Mass is neither created nor destoryed in chemical reactiosn
* see [[matter#laws]]
total number of molecules is always consistent
== Limiting Reagents ==
Reagent in a chemical reaction whose quantity limits the amount of product
formed
Excess reagent is the opposite
== Percent Yield ==
Amount of product formed in a lab reaction expressed as percentage
Is actual/expected
== [[solution|Solution]] ==
see [[solution|Solution]]
[[index]]