Two Moles per Liter

Raquel Stearns, Emma Wilds (2018-19)

Small text on mural reads: Grape Juice (KMnO4); Henderson; Hasselbalch.

Molarity (M) is the measure of concentration, expressed in moles per liter. We have two moles (animals) carrying 1 liter of solution. Therefore, two moles per liter. (Moles are a unit for counting small things like molecules: you have a dozen (twelve) eggs, and you have a mole (6.02 x 10^23) of atoms). Solutions in chemistry come with labelled molarities, like 2 M or 0.5 M. The Henderson-Hasselbalch equation (pH = pKa + log [Base]/[Acid]) is important in chemistry for determining the pH of titrations not at equilibrium using the concentrations of different reagents (or vice versa).