ILTS Science: Chemistry (240) study materials
ILTS Science: Chemistry (240) study resources

ILTS Science: Chemistry (240) study plan

ILTS Science: Chemistry (240) · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

Chemistry Content: Matter, Atomic Structure, and Periodicity & Chemistry Content: Chemical Bonding, Reactions, and Stoichiometry

  • Build a one-page periodic-trend reference sheet that predicts atomic radius, ionization energy, electron affinity, and electronegativity for any main-group element, then self-quiz on 20 elements until you score 90% or better.

  • Draw Bohr and orbital diagrams for the first 20 elements and write the full and noble-gas electron configurations from memory, checking each against a periodic table.

  • Classify 25 bonds as ionic, polar covalent, or nonpolar covalent using electronegativity differences, and predict each compound's dominant intermolecular force.

  • Balance 20 equations of mixed types (synthesis, decomposition, combustion, single and double replacement) and identify the limiting reactant in 10 of them.

  • Compute molar mass, percent composition, and empirical-to-molecular formula conversions for 10 compounds without a calculator error.

Your checkpoint

A single 2-page formula-and-trends sheet plus a scored 30-item self-test (record your raw score).

Week 2

Chemistry Content: Chemical Bonding, Reactions, and Stoichiometry

  • Solve 15 stoichiometry problems spanning mass-mass, mass-volume at STP, and solution-molarity pathways, showing unit cancellation on every line.

  • Determine limiting reactant, theoretical yield, and percent yield for 8 reaction scenarios, including one where the excess reactant is given in moles.

  • Write complete ionic and net ionic equations for 12 precipitation and acid-base reactions, using a solubility-rules table you construct yourself.

  • Predict products and assign oxidation states for 10 redox reactions, then balance 5 of them by the half-reaction method in acidic solution.

  • Explain in writing (150-200 words) how a mole-map diagram generalizes every stoichiometry problem, and use it to solve 5 unfamiliar problems.

Your checkpoint

A worked problem set of 20 stoichiometry and solution-stoichiometry items with a self-graded rubric.

Week 3

Chemistry Content: Thermochemistry, Kinetics, and Equilibrium

  • Calculate enthalpy change for 12 reactions using Hess's law, standard enthalpies of formation, and calorimetry data (q = mcΔT), tracking sign conventions.

  • Interpret and sketch potential-energy diagrams for exothermic and endothermic reactions, labeling activation energy, transition state, and ΔH.

  • Apply collision theory and the Arrhenius equation to explain how temperature, concentration, surface area, and catalysts change rate, and solve 6 rate-law problems from initial-rate data.

  • Determine reaction order and rate constant from a data table, then predict how doubling one reactant changes the rate.

  • Write equilibrium expressions and calculate Kc or Kp for 8 systems, then use Le Châtelier's principle to predict the shift for 10 stress scenarios.

Your checkpoint

A two-part problem set (thermochemistry/kinetics and equilibrium) totaling 25 items, with a written error log of every miss.

Week 4

Chemistry Content: Thermochemistry, Kinetics, and Equilibrium & Chemistry Content: Solutions, Acids and Bases, and Electrochemistry

  • Solve 10 equilibrium ICE-table problems, including one requiring the quadratic formula and one using the small-K approximation with a validity check.

  • Compute pH, pOH, [H+], and [OH-] for 15 strong and weak acid/base solutions, and verify each weak-acid answer with Ka.

  • Perform titration calculations for 8 scenarios, including identifying the equivalence point and selecting an appropriate indicator.

  • Explain the common-ion effect and buffer action, then calculate the pH of 5 buffer systems with the Henderson-Hasselbalch equation.

  • Distinguish Arrhenius, Brønsted-Lowry, and Lewis acid-base definitions with one original example each.

Your checkpoint

A timed 40-minute, 20-question mixed quiz on equilibrium and acid-base chemistry, scored and reviewed.

Week 5

Chemistry Content: Solutions, Acids and Bases, and Electrochemistry & Chemistry Content: Organic Chemistry, Biochemistry, and Nuclear Chemistry

  • Calculate solution concentration in molarity, molality, mass percent, and mole fraction for 10 solutions, and convert between units.

  • Predict colligative property effects (boiling-point elevation, freezing-point depression, osmotic pressure) for 6 solutions, including one electrolyte with a van't Hoff factor.

  • Assign oxidation numbers, sketch and label a galvanic cell, and calculate E°cell and spontaneity (ΔG° = -nFE°cell) for 6 redox systems.

  • Identify functional groups and name 15 organic compounds using IUPAC rules, including 5 with stereocenters or cis/trans isomerism.

  • Describe the structure and function of carbohydrates, lipids, proteins, and nucleic acids, and connect one enzyme's kinetics to the rate concepts from Week 3.

Your checkpoint

A one-page labeled galvanic-cell diagram plus a 15-item organic functional-group identification quiz, both scored.

Week 6

Chemistry Content: Organic Chemistry, Biochemistry, and Nuclear Chemistry & Foundations of Scientific Inquiry and the Nature of Science

  • Distinguish and give examples of alpha, beta, gamma, positron, and electron-capture decay, and complete 10 nuclear equations.

  • Solve 8 half-life problems and explain fission versus fusion with one real-world application of each.

  • Design a controlled experiment for a chemistry question, identifying independent, dependent, and controlled variables, a control group, and sources of error.

  • Evaluate a data set for accuracy and precision, calculate mean, percent error, and standard deviation, and interpret significant figures in 10 calculation chains.

  • Explain the scientific method, peer review, and the difference between hypothesis, theory, and law, using one chemistry example for each.

Your checkpoint

A written experimental design (300-400 words) with a data table and a short analysis of expected error sources.

Week 7

Science Laboratory Safety, Techniques, and Data Analysis & Pedagogical Content Knowledge and Instructional Practice in Chemistry

  • Create a lab-safety reference covering GHS hazard pictograms, SDS sections, PPE selection, and correct handling and disposal of acids, bases, and organic solvents.

  • Sequence the correct response to 5 lab emergencies (chemical splash, fire, spill, ingestion, glass cut) and identify the location and use of safety equipment.

  • Select appropriate techniques for measuring mass, volume, temperature, and pH, and explain when to use titration, filtration, distillation, or spectroscopy.

  • Draft a 20-minute lesson segment on one chemistry concept that includes a phenomenon hook, a model or demonstration, and a formative assessment.

  • Differentiate instruction for English learners and students with IEPs in a chemistry lab, listing three specific scaffolds.

Your checkpoint

A complete lab-safety plan plus a 20-minute lesson outline with assessment, reviewed against a self-made checklist.

Week 8

Foundations of Scientific Inquiry and the Nature of Science & Chemistry Content: Matter, Atomic Structure, and Periodicity & Chemistry Content: Chemical Bonding, Reactions, and Stoichiometry & Chemistry Content: Thermochemistry, Kinetics, and Equilibrium & Chemistry Content: Solutions, Acids and Bases, and Electrochemistry & Chemistry Content: Organic Chemistry, Biochemistry, and Nuclear Chemistry & Science Laboratory Safety, Techniques, and Data Analysis & Pedagogical Content Knowledge and Instructional Practice in Chemistry

  • Take two full-length timed practice exams under test conditions and log every missed item by domain and error type.

  • Re-teach your five weakest sub-topics from scratch on blank paper, then solve 5 new problems in each without notes.

  • Review your Week 1-7 deliverables and rewrite any sheet or summary that still contains an unresolved question.

  • Practice 10 constructed-response items, writing complete explanations with units, significant figures, and labeled reasoning.

  • Build a final one-page 'night before' sheet of constants, formulas, and trends, and confirm you can reconstruct it from memory.

Your checkpoint

A scored full-length practice exam with a domain-by-domain error analysis and a prioritized 48-hour review list.

Milestones

Week 2: Score at least 80% on a self-made 25-item assessment covering atomic structure, periodicity, bonding, and stoichiometry, with every miss corrected in writing.

Week 4: Complete the timed equilibrium/acid-base quiz at 75% or better and show correct ICE-table and pH setups for all missed items.

Week 6: Score 80% or better on a 30-item mixed set spanning solutions, electrochemistry, organic/biochemistry, nuclear chemistry, and inquiry, with a written error log.

Week 8: Score at least 80% overall on both full-length practice exams, with no domain below 70%, and finish the final formula sheet from memory.