## kittykitty04 2 years ago 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! :(

1. aaronq

convert 47.1 ppm to grams then to moles... 1g of water = 1 mL then Molarity=moles/L of solution

2. kittykitty04

okay... how do i go from ppm to g? :S

3. aaronq

ppm=(g of silver/g of water) x 1,000,000

4. aaronq

oh wait sort i meant *g of solution at the bottom

5. kittykitty04

okay, so you're saying ppm = (g of water/ g of solution)?

6. aaronq

times a million, yes

7. 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.

8. kittykitty04

x a million. lol

9. kittykitty04

wait. ugh, this is so frustrating. all that i just said that made no sense.

10. aaronq

haha oh i didn't even notice that.. it's probably a typo..

11. aaronq

47.1= (g of silver/45 mL )x1,000,000

12. aaronq

45 mL can from mass of water and density 1 g/ml= 45 g/V V= 45 mL

13. aaronq

45 came*

14. kittykitty04

alright. i think i got it, thanks aaron!

15. aaronq

(Y) good stuff !