Converting.... (1 Viewer)

[Premus]

Water samples from a certain oyster farm were found to be contaminated with
9.5ppm of lead. ( assume the density of the solution is 1g / mL )

convert 9.5 ppm to a concentration of moL/L

Thanks

 

[lucyinthehole]

ppm means mg/L

convert that to grams. then that to moles via the usual ways.

 

[sig]

that's an exact question from success one?

That is

9.5g / 1 000 000 g

9.5g in 1000L

Find moles (mass / molar mass) Pb ~ 207.2

[9.5/207.2] in 1000L

[9.5/207.2]/1000 = Concentration in mol / L

I get ~ 4.6 x 10^-5 mol/L