Question

Table 1 shows Rf values for 5 ions. Table 2 shows Rf values from 3 samples of wastewater. The same solvent was used for all ions and samples.

Table 1

Ion

Molar mass (g/mole)

Distance traveled (cm)

Rf

Spot color

Nickel(N2+)

58.7

0.8

0.08

pink

Cobalt(Co2+)

58.9

3.5

0.35

brown-black

Copper(Cu2+)

63.5

6.0

0.60

blue

Cadmium(Cd2+)

112.4

7.8

0.78

yellow

Mercury(Hg2+)

200.6

9.5

0.95

brown-black

Table 1 adapted from Thomas McCullough, CSC, and Marissa Curlee, “Qualitative Analysis of Cations Using Paper Chromatography.” ©1993 by the American Chemical Society.

Table 2

Sample

Rf

Spot color

1

0.60

0.78

blue

yellow

2

0.35

0.95

brown-black

brown-black

3

0.08

0.78

0.95

pink

yellow

brown-black



Question:6 ) Based on the information in Table 1, to best identify a metal ion using paper chromatography, one should know the:
A)  spot color for the ion only.
B)  distance the solvent traveled only
C)  Rf value and spot color for the ion only
D)  distance the solvent traveled and spot color of the ion only​

Answer 1

vdhdibdbrhdh dbdhdbd rbrvrb rbrbrbrbrbbr