ResourceSheet-2_ppm_for_solids[1]

ResourceSheet-2_ppm_for_solids[1] - CHEM/ENVS 380 Resource...

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CHEM/ENVS 380 Resource Sheet-2: “ppm” for Solids and Liquids (but not for gases!) 1. A solution is made up of the solute , the minor component that is dissolved, and the solvent , the dissolving medium. 2. Commonly encountered concentration units: [A] MOLE and VOLUME: e.g., (mol solute)/(L solution) = molarity = M (mmol solute)/(L solution) = mM = 10 -3 M (μmol solute)/(L solution) = μM = 10 -6 M (nmol solute)/(L solution) = nM = 10 -9 M, etc. [B] MASS and VOLUME: e.g., (g solute)/(L solution) (mg solute)/(L solution) (μg solute)/(L solution) (ng solute)/(L solution) [C] MASS and MASS: e.g., (g solute)/(kg solution) (mg solute)/(kg solution) = ppm (parts per million; 10 6 ) (μg solute)/(kg solution) = ppb (parts per billion; 10 9 ) (ng solute)/(kg solution) = ppt (parts per trillion; 10 12 ) Use molecular weight of the solute to switch between [A] and [B] Use density of the solution to switch between [B] and [C] 3. It is convenient to express concentrations of dilute solutions using
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This note was uploaded on 09/23/2011 for the course CHEM 380 taught by Professor Staff during the Spring '11 term at S.F. State.

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ResourceSheet-2_ppm_for_solids[1] - CHEM/ENVS 380 Resource...

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