145. Solving a chemistry problem
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145. Solving a chemistry problem
77. For the determination of sodium in wastewater, a comparison method was applied. The intensity of a standard solution of sodium with a concentration of 5.00 mg / l is equal to 20 conventional units. The analyzed solution had an intensity of 30 conventional units.
Determine the concentration (mg / l) of sodium in the analyzed solution - in waste water.
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