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MCAT Organic Question — Aqueous Solubility

Which of the following changes would have the largest effect on the aqueous solubility of sodium 3, 3-dimethyl-4-phenyl pentanoate?   A) Lowering the pH of the solution below the pKa of the carboxylic acid. B) Replacing the phenyl substituent with a non-conjugated alkyl ring structure. C) Increasing the length of the parent carbon chain by

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MCAT BioChem Question — Enzyme Catalyst

An enzyme catalyst is kept in a solution buffered to the pH that maximizes activity for those enzymes found in the blood. The enzyme catalyzes a reaction that produces an acid whose pKa is 4.5. In this buffer solution, the acid product will be:   A) Primarily deprotonated B) Primarily protonated C) Protonated and deprotonated

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MCAT Chemistry Question — Increasing pKa

Which of the following correctly lists the reagents in terms of increasing pKa?   A) Nitric Acid, Acetic Acid, Calcium Hydroxide B) Calcium Hydroxide, Acetic Acid, Nitric Acid C) Acetic Acid, Nitric Acid, Calcium Hydroxide D) Calcium Hydroxide, Nitric Acid, Acetic Acid  

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MCAT Organic Question — pKa

Arrange the following molecules in order of increasing pKa: CH3CH2COOH, CH3CHFCOOH, CH3OCH2COOH, CH3CHBrCOOH A) CH3CHFCOOH, CH3OCH2COOH, CH3CHBrCOOH, CH3CH2COOH B) CH3CHBrCOOH, CH3OCH2COOH, CH3CH2COOH, CH3CHFCOOH C) CH3CHFCOOH, CH3CH2COOH, CH3CHBrCOOH, CH3OCH2COOH D) CH3CH2COOH, CH3OCH2COOH, CH3CHFCOOH, CH3CHBrCOOH

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