ACS CP Study Guide 2026
Everything you need to pass the ACS CP exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ACS CP Exam Format at a Glance
📚 ACS CP Topics to Study (38)
✍️ Sample ACS CP Questions & Answers
1. The Clean Air Act regulates which of the following as a National Ambient Air Quality Standard (NAAQS) criteria pollutant?
Ground-level ozone is one of the six criteria pollutants regulated under NAAQS, along with particulate matter, CO, NO2, SO2, and lead.
2. Which experimental technique determines the order of a reaction with respect to individual reactants?
The method of initial rates involves varying one reactant concentration while holding others constant, then measuring the initial rate to determine individual orders.
3. Which analytical technique is most commonly used for measuring trace metal concentrations in environmental water samples?
ICP-MS provides ultra-trace detection of metals at parts-per-trillion levels and is the standard method for multi-element analysis of environmental water samples.
4. In the Arrhenius equation, the pre-exponential factor A (frequency factor) physically represents:
The pre-exponential factor A accounts for the collision frequency and the probability that colliding molecules have the correct geometric orientation to react.
5. A potentiometric sensor uses a glass electrode to measure pH. The Nernst equation predicts a slope of approximately how many mV per pH unit at 25°C?
At 25°C, the Nernst slope for a monovalent ion (H⁺, n=1) is RT/F × ln(10) ≈ 59.16 mV per decade of activity change.
6. What is the primary function of titration in analysis?
Titration is a quantitative chemical analysis method used to determine the unknown concentration of an identified analyte. It involves slowly adding a solution of known concentration (titrant) to a solution of unknown concentration (analyte) until the reaction reaches its equivalence point. By measuring the volume of titrant used, the analyte's concentration can be precisely calculated.