Because the 1972 exam predates the digital archives of AP Central , educators have manually compiled these "legacy" questions:
Let ( s ) = molar solubility. ( K_sp = [Pb^2+][F^-]^2 = (s)(2s)^2 = 4s^3 ) ( 4s^3 = 3.7 \times 10^-8 ) ( s^3 = 9.25 \times 10^-9 ) ( s = \sqrt[3]9.25 \times 10^-9 ) ( s \approx 2.10 \times 10^-3 , \textM ) 1972 ap chemistry free response answers
Students chose four out of six quantitative problems (35%). Content Highlights Because the 1972 exam predates the digital archives