G.27

Moderators: Chem_Mod, Chem_Admin

Casey Monahan 2C
Posts: 18
Joined: Wed Sep 21, 2016 2:57 pm

G.27

Postby Casey Monahan 2C » Sun Oct 02, 2016 10:54 am

I'm doing this out of the fifth edition book, so I'm not sure what number this is in the 6th edition, but here's the question:
G.27 The concentration of toxic chemicals in the environment is often measured in parts per million (ppm) or even parts per billion (ppb). A solution in which the concentration of the solute is 3 ppm by mass has 3g of the solute for every billion grams (1000 t) of the solution. The World Health Organization has set the acceptable standard for lead in drinking water at 10 ppb. You need to analyze some tap water for lead concentration, but your equipment is able to detect lead in concentrations only as low as 1x10^8 mol/L. Is your equipment satisfactory? You can assume that in such dilute solutions the density of the solution is 1.00g/cm^-3. Explain your reasoning.

Chem_Mod
Posts: 17949
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 406 times

Re: G.27

Postby Chem_Mod » Sun Oct 02, 2016 10:53 pm

I am going to assume you meant 1x10^-8 and 3 ppb, not ppm.

FullSizeRender.jpg-1.jpeg


Return to “Molarity, Solutions, Dilutions”

Who is online

Users browsing this forum: No registered users and 2 guests