Concept explainers
(a)
Interpretation:
Concentration of Helium in air is given as
5.24 ppm and number of moles of Helium in air at
25.00°C has to be calculated using
Concept Introduction:
Ideal gas equation relates concentration of a gaseous substance with pressure and temperature. The equation representing the relation is given as,
PV = nRT
Where,
P= PressureV= Volumen= Number of moles of the gaseous substanceT= TemperatureR= Universal gas constant
Parts Per Million refers to a term that expresses concentration of certain substance in a mixture of substances. It is denoted as ppm. It is represented as,
ppm = mass of substancemass of sample×106
In solution concentrations, 1 ppm is equivalent to 1 μg/mL or 1 mg/L.
(b)
Interpretation:
Molar concentration of Argon, Krypton, Xenon in air at 25.00°C and 1 bar has to be calculated.
Concept Introduction:
Ideal gas equation relates concentration of a gaseous substance with pressure and temperature. The equation representing the relation is given as,
PV = nRT
Where,
P= PressureV= Volumen= Number of moles of the gaseous substanceT= TemperatureR= Universal gas constant
Molarity, also formal concentration is one of the parameters used to express concentration of a solution. It is defined as the number of moles of the solute dissolved per liter of the solution. It is expressed as,
Molarity = number of moles of solutevolume of solution in L
Parts Per Million refers to a term that expresses concentration of certain substance in a mixture of substances. It is denoted as ppm. It is represented as,
ppm = mass of substancemass of sample×106
In solution concentrations, 1 ppm is equivalent to 1 μg/mL or 1 mg/L.
Parts Per Billion refers to a term that expresses concentration of certain substance in a mixture of substances. It is denoted as ppb. It is represented as,
ppb = mass of substancemass of sample×109
In solution concentrations, 1 ppb is equivalent to 1 ng/mL or 1 μg/L.
Volume percent is one of parameters used to express concentration of a solution and it is defined as percentage of volume of the solute present with respect to volume of the solution. It is expressed as,
Volume percent of a solute = volume of solutevolume of solution × 100%
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Chapter 1 Solutions
Quantitative Chemical Analysis
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