Unit 6 daily 2 chemistry
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Note: The above formula does not take into account any unit conversions, meaning that you have to insert the conversion factor without any units (if applicable).Įxample: Convert the equivalent concentration 2.41 meq/L HCO 3 - into the corresponding mass concentraton with the unit mg/L. Take the molar mass M and the valency z from table 2 as required. Keep in mind that the initial quantity is found in the leftmost table column, while the target quantity is listed in the upmost table row. Take the term for determining the conversion factor from table 1. Table 2: Data about selected ions occuring commonly in natural waters.
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Table 1: Factors for conversion of different concentration units. Neither is the ↓ electrical conductivity a concentration quantity, but instead an approximate indicator for the concentration of total dissolved solids (TDS) in water. The ↓ pH value is not a concentration quantity by definition, however can be considered as such for most water chemistry applications. ↓ Mass concentrations, ↓ mass fractions, ↓ molar concentrations, and ↓ equivalent concentrations can all be converted directly by applying stoichiometric relationships, likewise the different units of concentration for ↓ water hardness. This is both for historic reasons, and due to different conventions in different fields of application. In water chemistry, several different concentration quantities and units are in use. Electrical Conductivity Unit Conversions:.Concentration Quantities and Unit Conversions in Water Chemistry mg/L, g/m³, μg/L, ppm, ppb, mmol/L, meq/L, mval/L, mg-eq/L, °dH, °f, μS/cm, mS/m, mho/m.