Blueprint MCAT Blog: MCAT Chemistry

MCAT Chemistry Question — Strongest Reducing Agent

Given the list of reduction potentials, which of the following species is the strongest reducing agent? Li+(aq)+ e– →Li (s) Eored = -3.04 V Zn2+(aq) + 2 e– → Zn (s) Eored = -0.76 V Ag+(aq) + e– → Ag (s) Eored = 0.80 V Ce4+(aq) + e– → Ce3+ (s) Eored = 1.44 V READ MORE

Dec 22, 2014

MCAT Chemistry Question — Boiling Point

Which of the following explains why water (H2O) boils at 100oC while hydrogen sulfide (H2S) boils at -60 oC? A) Compounds with lower molecular weights boil at a higher temperature B) Oxygen is more electronegative than sulfur C) The stronger acidity of H2S makes it less volatile D) Water contains both hydrogen bonds and READ MORE

Dec 16, 2014

MCAT Chemistry Question — Mercury Meniscus

Mercury is a liquid with greater cohesive than adhesive forces, when placed in a glass tube (such as in a barometer). The meniscus formed with such a liquid would appear: A) Convex B) Flat C) Concave D) Irregular READ MORE

Dec 10, 2014

MCAT Chemistry Question — Ideal Gas Law

A container with a pressure of 3 atm occupies a volume of 11.2 L at 273 K. How many moles of gas are present in the container? A) 0.5 moles B) 1 mole C) 1.5 moles D) 3 moles READ MORE

Dec 04, 2014

MCAT Chemistry Question — Buffer Solution

Adding 2L of pure water to a 500mL buffer solution that contains equimolar concentrations of acetic acid and sodium acetate will have which of the following effects on the buffer? A) Increase pH B) Decrease pH C) Reduce buffering capacity D) No effect READ MORE

Dec 03, 2014

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 READ MORE

Nov 28, 2014

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 READ MORE

Nov 24, 2014

MCAT Chemistry Question — Temperature

Which of the following processes occur at the same temperature? I. Boiling II. Condensation III. Sublimation IV. Evaporation A) I and IV only B) I and II only C) II and III only D) I, II, and IV only READ MORE

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