DAT General Chemistry: High-Yield Study Guide to Score 20+ (2025–2026)

Why DAT General Chemistry Is a Score Lever Most Applicants Underuse

General Chemistry is 30 of the 100 Survey of Natural Sciences questions — the same weight as Organic Chemistry, and less than Biology's 40. But Gen Chem is different from both of those sections: it is formula-heavy, calculation-driven, and highly predictable. The students who score 20+ on Gen Chem are almost never the ones who "know chemistry." They are the ones who drilled the same high-yield problem types until the setup became automatic.

If your Biology is solid and your Orgo is average, Gen Chem is often the fastest path to raising your Total Science (TS) and Academic Average (AA). A two-point jump here is more achievable in four weeks of focused practice than the same jump in Biology, where content volume is much larger.

This guide covers what actually shows up, which formulas you need cold, the best resources, and a study sequence that works.

DAT General Chemistry: Format and Scoring

Number of questions: 30

Time context: Part of the 90-minute Survey of Natural Sciences (Biology + Gen Chem + Orgo)

Typical time budget: Roughly 25–28 minutes for Gen Chem if Biology takes ~33 minutes and Orgo ~30 minutes

Question style: Mix of conceptual recall and multi-step calculations. Many questions are "set up the equation correctly" more than they are "remember a fact."

Scoring: Scaled 1–30. A 20 is competitive for most programs. Top schools often want TS and AA in the 20–22+ range.

High-Yield Topic Map (What Actually Appears)

Tier 1: Must-Know Cold

Stoichiometry and Mole Concept

• Mole conversions, molar mass, percent composition
• Limiting reactant problems
• Empirical and molecular formulas
• Solution stoichiometry (Molarity = mol/L)
• Dilution equation: M1V1 = M2V2

Gas Laws

• Ideal Gas Law: PV = nRT (know units of R)
• Combined Gas Law
• Dalton's Law of Partial Pressures
• Graham's Law of Effusion
• STP definitions and molar volume (~22.4 L)

Acids, Bases, and Equilibrium

• Strong vs. weak acids/bases — know common strong acids (HCl, HBr, HI, HNO3, H2SO4, HClO4)
• pH, pOH, Kw = 1.0 × 10⁻¹⁴
• Ka, Kb, and relationship Ka × Kb = Kw for conjugates
• Henderson-Hasselbalch equation for buffers
• Titration curves: equivalence point, half-equivalence, indicators
• Le Chatelier's Principle — predict shifts for concentration, pressure, temperature

Thermochemistry

• First Law: ΔE = q + w
• Enthalpy (ΔH), endothermic vs. exothermic
• Hess's Law
• Bond energies and heat of formation
• Spontaneity: ΔG = ΔH − TΔS (know signs and what they mean)

Atomic Structure and Periodic Trends

• Electron configurations (including exceptions like Cr and Cu)
• Quantum numbers
• Ionization energy, electron affinity, electronegativity, atomic radius trends
• Isoelectronic series and effective nuclear charge

Tier 2: Frequently Tested

Kinetics

• Rate laws and order of reaction
• Rate-determining step
• Activation energy and catalysts
• Arrhenius relationship (qualitative understanding is enough for most questions)

Electrochemistry

• Oxidation vs. reduction; oxidizing/reducing agents
• Balancing redox in acid/base
• Galvanic vs. electrolytic cells
• Standard reduction potentials — which way spontaneous?
• Nernst equation (conceptual + basic calculation)

Solutions and Colligative Properties

• Solubility rules (know the common soluble/insoluble salts)
• Molality, mole fraction
• Freezing point depression, boiling point elevation
• Osmotic pressure basics

Nuclear Chemistry

• Alpha, beta, gamma decay
• Half-life calculations
• Binding energy concepts (less frequent, but short and testable)

Bonding and Molecular Geometry

• Ionic vs. covalent vs. metallic
• Lewis structures, formal charge, resonance
• VSEPR shapes (linear, trigonal planar, tetrahedral, trigonal bipyramidal, octahedral)
• Hybridization (sp, sp2, sp3)
• Polarity and intermolecular forces (H-bonding, dipole-dipole, London dispersion)

Tier 3: Lower Frequency (Study After Tier 1–2)

• Detailed solid-state chemistry (unit cells)
• Advanced spectroscopy
• Laboratory technique trivia beyond core methods

Formulas You Must Have Instant Recall For

Write these on a single sheet and quiz yourself until they are automatic:

If you hesitate on any of these under timed conditions, that hesitation will cost you questions elsewhere.

Best Resources for DAT Gen Chem (Ranked)

1. DAT Booster General Chemistry

Closest question style to the real exam for most students. Use after you review a topic — not as your first exposure.

2. Chad's Prep / Organic Chemistry Tutor (YouTube) for weak concepts

When a topic feels fuzzy (buffers, electrochemistry, kinetics), a 15-minute concept video often saves hours of frustrated drilling.

3. Anki or a Gen Chem formula/fact deck

Flashcards for strong acids, solubility rules, periodic trends, and formulas. Calculations still need practice problems — cards alone are not enough.

4. DAT Destroyer Gen Chem (for 22+ targets)

Harder than the real DAT. Excellent once you are already scoring 19–20 and want to push higher. Not ideal as a starting resource.

5. Practice full SNS sections under timed conditions

Gen Chem score collapses when Biology eats too much clock time. Practice Gen Chem inside full SNS blocks, not only as isolated 30-question quizzes.

4-Week Study Plan to Raise Gen Chem

Week 1: Stoichiometry, Gases, Atomic Structure

• Review content for each topic (notes or video)
• 40–60 practice questions across the three areas
• Drill M1V1, PV=nRT, and mole conversions until automatic

Week 2: Acids/Bases, Equilibrium, Thermochemistry

• This is the highest-yield week for most students
• Master pH calculations, Ka/Kb, buffers, Le Chatelier, ΔG/ΔH/ΔS
• End the week with a timed Gen Chem mini-section (30 questions)

Week 3: Kinetics, Electrochemistry, Bonding, Solutions

• Redox and cell potentials trip up many applicants — give them extra time
• VSEPR + hybridization + IMFs as a short daily drill
• Review every missed question in a "error log"

Week 4: Mixed Practice and Weak-Area Targeting

• 3–4 full Survey of Natural Sciences practice blocks
• After each, score Gen Chem separately and only review your bottom 3 topics
• Final 3 days: formula sheet + error log + light mixed sets (no new content)

The Mistakes That Cap Gen Chem Scores at 17–18

1. Knowing the concept but failing the setup

Students say "I understand buffers" but cannot plug Henderson-Hasselbalch correctly under time pressure. Understanding is not enough — reps are required.

2. Skipping unit discipline

Wrong R value, mL vs. L, Celsius vs. Kelvin — these are free points you are giving away.

3. Studying Gen Chem only in isolation

On test day it comes after Biology. If you never practice Gen Chem when already mentally fatigued, your practice scores will overestimate your real score.

4. Ignoring Le Chatelier and qualitative equilibrium

Not every question is a calculation. Qualitative "which way does the reaction shift?" items are high-yield and fast if you have the rules cold.

5. Over-indexing on obscure topics

Unit cells and exotic nuclear details are lower yield. Lock Tier 1 first.

How Gen Chem Fits With Biology and Orgo

If you are following a full DAT plan, Gen Chem pairs well with Organic Chemistry on the same study days (both are calculation/mechanism heavy), while Biology stays on Anki + reading. For a complete Biology strategy, see our DAT Biology high-yield guide. For overall scheduling, use How to Study for the DAT.

When Tutoring Helps Faster Than Solo Practice

If you are stuck at 17–18 after two solid weeks of practice, the bottleneck is usually a small set of topics — buffers, electrochemistry, or stoichiometry setups — not "all of chemistry." Targeted tutoring on those clusters often moves scores faster than another month of unfocused drilling.

If you want help identifying your Gen Chem weak points and fixing them with a structured plan, schedule a free consultation with Future Dentist Prep.