what is the Fe concentration in ppm of a 10.00mL of 500 ppm Fe solution which has been diluted to 100ml?

c1v1 = c2v2

c = concn
v = volume or the easy way is
500 ppm x (10.0 mL/100 mL) = 50 ppm

To determine the Fe concentration in ppm of the diluted solution, we need to use the dilution formula:

C1V1 = C2V2

Where:
C1 = Initial concentration of the solution before dilution
V1 = Initial volume of the solution before dilution
C2 = Final concentration of the solution after dilution
V2 = Final volume of the solution after dilution

In this case, we are given:
C1 = 500 ppm
V1 = 10.00 mL
V2 = 100 mL

First, we need to calculate the final concentration, C2:

C2 = (C1 * V1) / V2

Substituting the values provided:
C2 = (500 ppm * 10.00 mL) / 100 mL

Now, let's calculate:
C2 = 5000 ppm.mL / 100 mL
C2 = 50 ppm

Therefore, the Fe concentration in ppm of the 10.00 mL of 500 ppm Fe solution diluted to 100 mL is 50 ppm.