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MCAT Organic Chemistry: Techniques in Solubility-Based Separations and Purifications

MCAT Organic Chemistry: Techniques In Solubility-based Separations And Purifications

This assessment focuses on separations and purifications within organic chemistry, crucial for MCAT preparation. It evaluates understanding of key separation techniques and their applications, essential for aspiring medical...

Questions: 20 | Attempts: 10 | Last updated: Aug 4, 2025

Sample Question 1
What is extraction in terms of solubility-based methods?

Heating a compound to remove impurities.

Mixing together two compounds that have identical solubilities.

Subjecting a compound to high pressure to increase solubility.

Combines 2 immiscible liquids, one of which easily dissolves the compound of interest. ***Acid-base properties can be used to increase solubility (dissolve an acid in a base & a base in an acid)Aqueous Phase - polar (water) layer that dissolves compounds w/ hydrogen bonding or polarityOrganic Phase - nonpolar layer that dissolves nonpolar compounds

Sample Question 2
What is the purpose of wash in solubility-based methods?

Reverse of extraction, where a small amount of solute that dissolves impurities is run over the compound of interest

To separate the impurities from the compound of interest

To precipitate the compound of interest

To completely dissolve the compound of interest

Sample Question 3
What is the purpose of filtration in solubility-based methods?

Convert a gas into a liquid state for easier manipulation.

Separate two immiscible liquids based on density difference.

Dissolve a solid in a liquid to form a homogeneous mixture.

Isolate a solid (residue) from a liquid (filtrate); liquid-solid mixtures is poured onto paper filter that allows solvent to pass through & solid is collected on the paperGravity FiltrationVacuum Filtration

Mastering Recrystallization: A Quiz on Solubility and Purification Techniques

Explore the fundamentals of recrystallization in this focused quiz, designed to assess your understanding of the theory behind this essential chemical purification process. Perfect for learners aiming to enhance their practical...

Questions: 20 | Attempts: 10 | Last updated: Aug 4, 2025

Sample Question
How are crude solid compounds isolated from a chemical synthesis or extraction purified?

By sublimation, which involves the transition of a solid directly to a gas.

By chromatography, which separates compounds based on their affinity to a stationary phase.

By distillation, which involves the separation of compounds based on differences in volatility.

By recrystalization. Which is based on the difference of solubility of solids in a given solvent system