kittykitty04
  • kittykitty04
Analysis of a 45.0g sample of water revealed a silver concentration of 47.1ppm. Assuming the solution has a density of 1.00g/mL. Calculate the molar concentration of the silver in the solution. (I am so lost with this question. Does it make sense to anyone?) help! :(
Chemistry
chestercat
  • chestercat
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aaronq
  • aaronq
convert 47.1 ppm to grams then to moles... 1g of water = 1 mL then Molarity=moles/L of solution
kittykitty04
  • kittykitty04
okay... how do i go from ppm to g? :S
aaronq
  • aaronq
ppm=(g of silver/g of water) x 1,000,000

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aaronq
  • aaronq
oh wait sort i meant *g of solution at the bottom
kittykitty04
  • kittykitty04
okay, so you're saying ppm = (g of water/ g of solution)?
aaronq
  • aaronq
times a million, yes
kittykitty04
  • kittykitty04
sorry, this question confuses me because it says "silver concentration of 47.1 ppm" in the beginning of the question and then it says "calculate the concentration of the lead in the solution" at the end. it totally messes with me! ah! :| So it says "assuming the solution has a density of 1.00g/mL" should I do ( 45.0g water/ 1.00 g/ml) = 45 mL? i'm so lost.
kittykitty04
  • kittykitty04
x a million. lol
kittykitty04
  • kittykitty04
wait. ugh, this is so frustrating. all that i just said that made no sense.
aaronq
  • aaronq
haha oh i didn't even notice that.. it's probably a typo..
aaronq
  • aaronq
47.1= (g of silver/45 mL )x1,000,000
aaronq
  • aaronq
45 mL can from mass of water and density 1 g/ml= 45 g/V V= 45 mL
aaronq
  • aaronq
45 came*
kittykitty04
  • kittykitty04
alright. i think i got it, thanks aaron!
aaronq
  • aaronq
(Y) good stuff !

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