Separations of Solutions and Mixtures - AP Chemistry
- Which technique separates components based on differences in their affinity to a stationary phase?
- Chromatography. Different attraction strengths cause variable retention times.
- State the method used to remove a solvent from a solution by heating.
- Evaporation. Heat energy converts liquid solvent to vapor phase.
- Identify the technique that separates non-volatile solids from liquids.
- Evaporation. Heat converts liquid to vapor, leaving solid behind.
- What is the principle behind distillation?
- Separation based on boiling points. Components with lower boiling points vaporize first.
- Which method separates mixtures by spinning them at high speed?
- Centrifugation. Centrifugal force overcomes gravity for faster separation.
- What technique can separate a mixture of ethanol and water?
- Fractional distillation. Different boiling points enable step-wise separation.
- What is the separation method based on particle size?
- Filtration. Larger particles cannot pass through the filter medium.
- What is the role of temperature in distillation?
- Provides energy for phase change. Heat supplies energy needed for liquid-to-vapor transition.
- What method uses a centrifugal force to separate mixtures?
- Centrifugation. High-speed rotation separates based on density differences.
- Which technique involves evaporating a solvent to obtain a solute?
- Evaporation. Solvent vaporizes leaving behind the dissolved solute.
- Identify the separation process for obtaining pure water from seawater.
- Distillation. Water vaporizes leaving dissolved salts behind.
- What method is used to purify a substance through repeated crystallization?
- Recrystallization. Controlled crystallization removes impurities from desired compound.
- What is the principle of fractional distillation?
- Separation based on boiling point differences. Multiple vaporization-condensation cycles enhance separation.
- What is the main criterion for separation in chromatography?
- Differential affinity for the stationary phase. Stronger affinity causes longer retention on stationary phase.
- What is the purpose of using a separating funnel?
- To separate immiscible liquids. Density differences allow layer formation and separation.
- Which method is used to concentrate a solution by vaporizing the solvent?
- Evaporation. Removes solvent while retaining dissolved components.
- What is the function of the stationary phase in chromatography?
- Retards components based on affinity. Holds back components through selective adsorption or absorption.
- What is the purpose of using a condenser in distillation?
- To cool and condense vapor back to liquid. Heat removal causes vapor to return to liquid state.
- What is the separation technique for immiscible liquid mixtures?
- Separating funnel. Gravity-based separation of non-mixing liquid phases.
- State the method used to separate mixtures of liquids with different boiling points.
- Distillation. Components vaporize at different temperatures.
- What is the separation process for obtaining crystals from a solution?
- Crystallization. Controlled precipitation forms pure crystal structures.
- Which technique is useful for separating colloidal particles?
- Centrifugation. High-speed rotation overcomes Brownian motion effects.
- Which technique separates components based on differences in their affinity to a stationary phase?
- Chromatography. Different attraction strengths cause variable retention times.
- State the method used to remove a solvent from a solution by heating.
- Evaporation. Heat energy converts liquid solvent to vapor phase.
- In chromatography, what is the role of the mobile phase?
- Carries components through the stationary phase. Transports dissolved components through the separation medium.
- What technique uses a solvent to separate components based on solubility?
- Extraction. Components dissolve preferentially in different solvents.
- Which separation method utilizes a filter medium?
- Filtration. Porous material blocks particles while allowing liquid passage.
- What is the principle behind distillation?
- Separation based on boiling points. Components with lower boiling points vaporize first.
- What process can separate a soluble substance from a solvent?
- Evaporation. Solvent removal concentrates the dissolved substance.
- Which separation technique involves the change of state from liquid to gas?
- Distillation. Vaporization allows separation based on volatility differences.
- Which technique separates components based on differences in their affinity to a stationary phase?
- Chromatography. Different attraction strengths cause variable retention times.
- What is the purpose of using a separating funnel?
- To separate immiscible liquids. Density differences allow layer formation and separation.
- Which separation technique is based on density differences?
- Centrifugation. Denser components settle faster under centrifugal force.
- What is the principle governing the separation in extraction?
- Differential solubility in solvents. Components partition between phases based on solubility preferences.
- Which technique involves evaporating a solvent to obtain a solute?
- Evaporation. Solvent vaporizes leaving behind the dissolved solute.
- Identify the method used to separate a homogeneous mixture of liquids.
- Distillation. Vaporization and condensation separate miscible liquid components.
- What technique separates substances based on mass and density using a centrifuge?
- Centrifugation. Artificial gravity enhances separation of dense particles.
- Identify the process that separates components based on their movement through a medium.
- Chromatography. Components move at different rates through the stationary phase.
- What is the purpose of using a separating funnel?
- To separate immiscible liquids. Density differences allow layer formation and separation.
- What method uses a centrifugal force to separate mixtures?
- Centrifugation. High-speed rotation separates based on density differences.
- Identify the process used to separate a solid from a liquid in a heterogeneous mixture.
- Filtration. Uses physical barriers to separate based on particle size.
- Identify the method that separates components based on vaporization and condensation.
- Distillation. Converts liquid to vapor then back to liquid selectively.
- Which method can be used to separate a mixture of sand and salt?
- Dissolution followed by filtration. Salt dissolves while sand remains insoluble for filtration.
- What technique separates substances based on mass and density using a centrifuge?
- Centrifugation. Artificial gravity enhances separation of dense particles.
- State the method used to remove a solvent from a solution by heating.
- Evaporation. Heat energy converts liquid solvent to vapor phase.
- Which technique involves evaporating a solvent to obtain a solute?
- Evaporation. Solvent vaporizes leaving behind the dissolved solute.
- What is the principle of chromatography?
- Separation based on different affinities. Different molecular interactions with phases enable separation.
- What technique separates substances based on mass and density using a centrifuge?
- Centrifugation. Artificial gravity enhances separation of dense particles.
- Identify the method to separate dyes from ink.
- Paper chromatography. Different dye molecules have varying paper affinities.
- Identify the process to separate a mixture of oil and water.
- Separating funnel. Immiscible liquids form distinct layers for separation.
- Which separation technique is used to purify a solid by dissolving impurities?
- Recrystallization. Dissolves solid, removes impurities, then recrystallizes pure product.
- What separation technique uses a porous barrier to separate components?
- Filtration. Filter allows liquid to pass while retaining solid particles.
- What is the principle behind distillation?
- Separation based on boiling points. Components with lower boiling points vaporize first.
- What method uses a centrifugal force to separate mixtures?
- Centrifugation. High-speed rotation separates based on density differences.