Week 4: Paper Chromatography Pre-Lab uestions Due: at the start of your week 4 (

Question

Week 4: Paper Chromatography Pre-Lab uestions Due: at the start of your week 4 (2/13-2/17) labs. 1 (2 points) As a first problem in this lesson, Dumbledore would like to know what chromatog- raphy means. This seems like a reasonable place to start. Which pair of words best describes chromatography? A) Time Writing B) Color-Writing C) Sleep-Walking D) Time-Traveling 2. (2 points) We now all know what chromatography means Snape looks disapprovingly around the class, he's not convinced of this. Dumbledore assures him everyone has read the chapter... right? Now let's consider specifics of the experiment In this experiment the stationary phase is made out of what? A) Polycarbonate B) Acetone C) Cellulose D) G. ass beads 3. (2 points) Furthermore, what is the mobile phase in this experiment? A) 10% 6M NaOH and 90% acetone B) 10% 6M HCl and 90% acetone C) 10% 5M KCl and 90% methanol D) 10% 5M KCl and 90% acetone 4 (2 points) In the event you need to write on your chromatogram, which should you use? Ron asks if he can use his finger... this is not acceptable A) Pen B) Pencil C) Marker D) Paintbrush

Explanation / Answer

1) Chroma = color and grahy = writing

Chromatography = color - writing

Ans (B)

2) Stationary phase is paper which is made of cellulose

Ans (C)

3) Mobile phase is primarily acetone with little HCl.

Ans (B)

4) Pencil

Ans (B)

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