Question

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! :(

Answer 1

convert 47.1 ppm to grams then to moles...
1g of water = 1 mL

then Molarity=moles/L of solution

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

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

Answer 6

times a million, yes

Answer 7

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.

Answer 8

x a million. lol

Answer 9

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

Answer 10

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

Answer 11

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

Answer 12

45 mL can from mass of water and density

1 g/ml= 45 g/V

V= 45 mL

Answer 13

45 came*

Answer 14

alright. i think i got it, thanks aaron!

Answer 15

(Y) good stuff !