FAQs Chemistry: Methods of Purification and Separation

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~ Draw the set-up for obtaining the precipitate from a suspension.

~ Draw the set-up for obtaining pure water from salt water.

~ Write down the formula to find Rf value.

~ Describe the process of paper chromatography.

~ What are the 2 methods to determine the purity of a substance?

~ Explain the importance of the measurement of the purity of substances that we use in foodstuffs and drugs.

~ In paper chromatography, why must the start line be above the solvent line?

~ In paper chromatography, the start line is drawn with a pencil rather than a pen. Explain the reason for this.