moneyeveryday4790 moneyeveryday4790
  • 24-01-2019
  • Chemistry
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A water sample contains the pollutant chlorobenzene with a concentration of 15 ppb. what is the molarity of this solution

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AsiaWoerner AsiaWoerner
  • 03-02-2019

We know that

[tex]1ppb=0.00001 g/L[/tex]

therefore

[tex]15ppb = 0.000015 g/L[/tex]

the molar mass of chlorobenzene is 112.56

therefore moles of chlorobenzne in 15ppb will be:

[tex]moles_{chlorobenzene}=\frac{mass}{molarmass}=\frac{0.000015 g}{112.56}=1.33X10^{-7}[/tex]

Molarity is number of moles of solute dissolved in one litre of solution

The molarity will be thus

[tex]\frac{1.33X10^{-7}mol}{1L}[/tex]

[tex]molarity=1.33X10^{-7}mol/L[/tex]



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