Asked by Lisa
If 0.10 mg Fe is diluted in a 50 mL flask, what is the concentration of the resulting solution? What volume of the resulting solution is needed to prepare 25.0 mL of a dilute sample solution with a concentration of 0.30 ppm Fe?
Answers
Answered by
DrBob222
"What is the concn of the resulting solution" is an open ended question. What units? The easy answer is it's 0.1 mg/50 mL but that probably isn't the unit you want.
Since you want to prepare a dilute solution in ppm I thin the answer probably should be in ppm
1 ppm = 1 mg/L so all we need to do is to convert 0.1 mg/50 mL to mg/L.
That's 0.1 mg x (1000/50) = 2 mg/L = 2 ppm.
Then use the dilution formula of
c1v1 = c2v2
0.30*25 = 2*v2
v2 = ?
Since you want to prepare a dilute solution in ppm I thin the answer probably should be in ppm
1 ppm = 1 mg/L so all we need to do is to convert 0.1 mg/50 mL to mg/L.
That's 0.1 mg x (1000/50) = 2 mg/L = 2 ppm.
Then use the dilution formula of
c1v1 = c2v2
0.30*25 = 2*v2
v2 = ?
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