The 1972 AP Chemistry exam featured [18]. While the College Board's official archive typically only lists materials from the last few years, several educational resources host worked solutions for these legacy questions [4].
The reaction ( 2NO + O_2 \rightarrow 2NO_2 ) is proposed to occur via: Step 1 (fast equilibrium): ( NO + O_2 \rightleftharpoons NO_3 ) Step 2 (slow): ( NO_3 + NO \rightarrow 2NO_2 ) Derive the rate law. 1972 ap chemistry free response answers
Electronic configurations and periodic trends. 🧪 Detailed Solutions and Explanations Question 1: Chemical Equilibrium and Gas Phase Reactions Topic: The dissociation of phosphorus pentachloride ( PCl5cap P cap C l sub 5 The 1972 AP Chemistry exam featured [18]
The 1972 AP Chemistry Free-Response section featured several classic problems covering stoichiometry, thermodynamics, and acid-base chemistry. Below are detailed solutions and explanations for the primary questions released from that year. 1. Stoichiometry and Gas Laws (Acid-Base Mixture) : A 5.00g sample mixture of KOHcap K cap O cap H KClcap K cap C l is reacted with 0.100L0.100 cap L 2.00M2.00 cap M HClcap H cap C l . The reaction produces 249mL249 m cap L CO2cap C cap O sub 2 740torr740 t o r r ). The excess HClcap H cap C l is titrated with 86.6mL86.6 m cap L 1.50M1.50 cap M NaOHcap N a cap O cap H Part A: Percentage of in the mixture Find moles of CO2cap C cap O sub 2 : Use . Convert units: CO2cap C cap O sub 2 Find mass of : From the balanced equation Electronic configurations and periodic trends
Let’s reconstruct a typical question from that year (paraphrased from actual historical prompts):
: The solution involves understanding how many chloride ions are "labile" (ionic) versus coordinated within the complex. For example, in
In 1972, the free response section (then called "Part II") typically consisted of . Students had 90 minutes. No periodic table with atomic weights? You had to memorize them (or at least round well). No calculators? You had a slide rule or long division.