Problems involving Faraday’s law of electrolysis to calculate the amount of product generated at an electrode ( 4. Molecular Structure and Bonding
Students were generally required to complete several multi-part questions within a limited time, demanding both speed and conceptual accuracy. Key Topics Tested in 1972 Free Response Questions
N2 (g) + 3H2 (g) ⇌ 2NH3 (g)
A 1.0 mol sample of CO(g) is heated at constant pressure. On the graph below, sketch the expected plot of volume versus temperature as the gas is heated.
PbCl2(s)⇌Pb2+(aq)+2Cl−(aq)PbCl sub 2 open paren s close paren is in equilibrium with Pb raised to the 2 plus power open paren a q close paren plus 2 Cl raised to the negative power open paren a q close paren 1972 ap chemistry free response answers
Write balanced net ionic equations for the following:
Looking at the 1972 answers reveals several stark differences in how chemistry is tested: No Calculators: On the graph below, sketch the expected plot
Interpreting graphs of concentration vs. time to determine if a reaction was zero, first, or second order. 5. Atomic Structure and Bonding
The molar solubility decreases drastically in the presence of a common ion, confirming Le Chatelier's principle. Section II: Gas Laws and Stoichiometry (Question 2) The Problem H2O → H moles
Combustion yields 22.0 g CO2 and 9.00 g H2O from 10.0 g sample. Find empirical formula. Steps: convert CO2 → C moles, H2O → H moles, divide by smallest, get whole-number ratio → empirical formula.
ΔH°f (C2H5OH, l) = -277.4 kJ/mol