6.4Molarity
Section · module m68703
What this needs
Learn these first — this section will not make sense without them.
All four worked examples in this section are purely symbolic 'rearrange the formula, then substitute' derivations — mol solute = M x L solution is rearranged from M = mol/L before either number is touched, and C2 = C1V1/V2, V2 = C1V1/C2, V1 = C2V2/C1 are each rearranged from C1V1 = C2V2 in symbols first — with no numeric equation left to combine or simplify afterward; a student who cannot isolate the named letter symbolically cannot even reach the point of substituting numbers.
What this touches
Algebra that turns up here. Not a blocker, but this is where you will see it used.
- Applies5.9Modeling Using Variation
Because moles of solute are held constant while diluting, M (or C) is inversely proportional to V — C₁V₁=C₂V₂ is the same inverse-variation pattern as any 'holding one product constant' relationship, just introduced by name as 'the dilution equation' rather than as variation.