14.Calculate the Rf value when one colour had moved by 50mm and the solvent had moved by 100mm. Calculate to 1 decimal place.

1. Break Down the Problem

To calculate the Rf value (Retention factor) in chromatography, we need to understand the relationship between the distance a substance moves and the distance the solvent front moves.

2. Relevant Concepts

The formula for calculating the Rf value is: $Rf = \frac{\text{Distance moved by the substance}}{\text{Distance moved by the solvent}}$

3. Analysis and Detail

1. Distance moved by the substance = 50 mm
2. Distance moved by the solvent = 100 mm
3. Applying the values to the formula: $Rf = \frac{50 \, \text{mm}}{100 \, \text{mm}} = 0.5$

4. Verify and Summarize

We have calculated the Rf value using the appropriate distance measures. Since the distances were directly used in the formula without any discrepancies, the calculation stands verified.

Final Answer

The Rf value is $0.5$.