Front

What is chromatography?

Back

A laboratory technique used to separate mixtures into their individual components based on their movement through a stationary phase.

Front

What does Rf value represent in chromatography?

Back

The Rf value (retention factor) is the ratio of the distance traveled by the substance to the distance traveled by the solvent front.

Front

What is the significance of the color change in flame tests?

Back

The color change indicates the presence of specific metal ions in a compound, as different metals produce characteristic flame colors.

Front

What is the flame color produced by potassium chloride?

Back

Violet.

Front

What is the purpose of flushing the syringe in gas chromatography?

Back

Flushing the syringe removes residual sample from previous injections, ensuring accurate and uncontaminated results.

Front

What are trace powders?

Back

Trace powders are small amounts of powder that can be found on surfaces or materials, often used in forensic analysis.

Front

How can gold particles be transferred to a person's hands?

Back

Gold particles can be transferred through contact with objects containing gold, such as jewelry or clothing with gold threading.

Front

What is the role of a stationary phase in chromatography?

Back

The stationary phase is the material that remains fixed in place during the chromatography process, allowing for separation of components based on their affinity to it.

Front

What is the difference between qualitative and quantitative analysis in chromatography?

Back

Qualitative analysis identifies the components present, while quantitative analysis measures the amount of each component.

Front

What is the typical use of gas chromatography (GC)?

Back

Gas chromatography is commonly used to analyze volatile substances in a mixture, such as gases and liquids.