What was color of F e3+ before staining?
- Colorless
- Faint yellow
- Faint pink
- Faint blue
Faint yellow
What was color of A g+ before staining?
- Faint yellow
- Colorless
- Faint blue
- Faint pink
Colorless
What was color of B i3+ before staining?
- Faint blue
- Faint yellow
- Colorless
- Faint pink
Colorless
What was color of C o2+ before staining?
- Colorless
- Faint blue
- Faint yellow
- Faint pink
Faint pink
What was color of C u2+ before staining?
- Faint blue
- Faint pink
- Colorless
- Faint yellow
Faint blue
What was color of F e3+ after staining?
- Burgundy/Brown
- Greyish
- Blue
Blue
What was color of A g+ after staining?
- Greyish or faint yellow
- Blue
- Burgundy/Brown
Greyish or faint yellow
What was color of B i3+ after staining?
- Blue
- Greyish/Yellow/Orange
- Burgundy/Brown
Greyish/Yellow/Orange
What was color of C o2+ after staining?
- Burgundy/Brown
- Greyish
- Blue
Greyish
What was color of C u2+ after staining?
- Blue
- Greyish
- Burgundy/Brown
Burgundy/Brown
What were the approximate Rf of the cations on the completed plate? Please use student data.
Rf Calculations of Cations:
Rf of Ag^+ = 0.0009
Rf of Co^2+ = 0.384
Rf of Cu^2+ = 0.512
Rf of Fe^3+ = 0.705
Rf of Bi^3+ = 0.876
Rf Calculations of Unknown Cation Mixture:
Rf of Unknown Cation Spot 1 = 0.0009
Rf of Unknown Cation Spot 2 = 0.386
Rf of Unknown Cation Spot 3 = 0.877
Show how one of the Rf values was obtained. (Show work with short verbal descriptions of numbers.) Please use Student Data.
Rf of Ag^+ = 0.01 cm (distance cation moved) / 11.00 cm (distance solvent moved) = 0.0009
Consider the slide pictured below. What ions are present in the unknown solution?
Screen Reader User: Image: Rectangular plate about 6.5 cm high. Horizontal line at 5.5 cm from bottom. Horizontal line 0.5 cm from the bottom marked with A g+, C o2+, C u2+, F e3+, B i3+ and Unk at regular intervals. Vertical ruler starts at 0 cm at horizontal line. A g+ = yellow dot on line. C o 2+ = grey elongated dot at 2 to 3 cm from line. C u2+ = orange dot at 2.5 to 3 cm from line. F e3+ = blue dot 3 to 3.5 cm from line. B i3+ = beige dot at 4 cm from line. Unk = orange dot at 2.5 to 3 cm from line and blue dot 3 to 3.5 cm from line. End of image.
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5% = 4
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