Concentration Terms and Calculations - Quantum

In the case of environmental pollution, much smaller concentration terms are needed. Two ofthe most common ones are parts per million (ppm) and parts per billion (ppb). Both terms express theamount of solute per million or billion parts of solution. The solute units and solvent units must beidentical when doing the calculation.If the solvent is water and parts are grams, ppm may be redefined in mass/volume units by using 1.00g/mL for the density of a dilute aqueous solution.Similarly, ppb becomes µg solute/L solution by substituting 10 9 for 10 6 and 10 6 µg for 1000 mg in theabove equation.How to calculate the molarity of a solution from m/v%The normal level of glucose in the blood usually averages 100. mg/100. mL. Calculate the averagemolarity of glucose in blood.Solution:Write down the given values with theirunits and what they represent.In this problem, mg/v% is given for the solute glucose andthe solvent blood. The chemical formula for glucose isC 6 H 12 O 6 . The molar masses of C, H, and O can be obtainedfrom the Periodic Table.mg/v% = 100. mg glucose/100. mL blood1 mol C = 12.01 g/mol1 mol O = 16.00 g/mol1 mol H – 1.008 g/molmolar mass glucose = 180.16 g/mol