the.com/molarity
chemistry's way of counting molecules by the trillion-trillion without ever seeing one
means The concentration of a solution expressed as the number of moles of dissolved substance per liter of solution.
from Built from 'molar,' the adjective form of 'mole' — chemistry's unit for a fixed, staggeringly large count of particles (Avogadro's number). 'Mole' itself was clipped from the German Molekül, 'molecule,' coined by the chemist Wilhelm Ostwald around the turn of the 20th century, drawing on Latin moles, 'a mass or heap.' So 'molarity' is, at root, a measure of how much 'heap' you've stirred into your liter.
- the unit
- moles of solute per liter of solution
- temperature trap
- changes with heat as volume expands
- vs molality
- molality uses mass, dodges thermal swelling
- one mole
- 602 sextillion particles, Avogadro's absurd headcount
- symbol
- capital M, written right after the number