Question

Lastly, Snape thinks we should try one more calculation. What is the retention factor if the distance travelled by the solvent front is 2.00 cm, and the distance the ion is from the solvent front is 0.20 cm?
Hint: Be careful with how Snape worded this question.

Answer 1

Answer:

The retention factor of an ion is 0.10 .

Explanation:

Retention factor is defined as ratio of distance of distance traveled by solute to the distance traveled by solvent on chromatogram.

$R_f=\frac{d_{solute}}{d_{solvent}}$

We have:

$d_{solute}=d_{ion}=0.20 cm$

$d_{solven}=2.00 cm$

The retention factor of an ion :

$R_f=\frac{0.20 cm}{2.00 cm}=0.10$