general chemistry

Congratulations to Avi Agh, the winner of our 2026 Labor Day Giveaway! Avi selected the 2026 DAT Destroyer, our complete DAT science preparation book covering Biology, General Chemistry, and Organic Chemistry. Thank you to everyone who participated. Dr. Romano and I truly appreciate your...

Congratulations to Avi Agh, the winner of our 2026 Labor Day Giveaway! Avi selected the 2026 DAT Destroyer, our complete DAT science preparation book covering Biology, General Chemistry, and Organic Chemistry. Thank you to everyone who participated. Dr. Romano and I truly appreciate your...

Congratulations to one of our Summer DAT students on an outstanding DAT performance! Academic Average: 530 Survey of the Natural Sciences: 540 General Chemistry: 600 Organic Chemistry: 560 Quantitative Reasoning: 530 Reading Comprehension: 500 Perceptual Ability: 460 Biology: 450 The DAT was...

Congratulations to one of our Summer DAT students on an outstanding DAT performance! Academic Average: 530 Survey of the Natural Sciences: 540 General Chemistry: 600 Organic Chemistry: 560 Quantitative Reasoning: 530 Reading Comprehension: 500 Perceptual Ability: 460 Biology: 450 The DAT was...

Can you identify which isotopic pair would exhibit the greatest kinetic isotope effect? Choose your answer before checking the explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from...

Can you identify which isotopic pair would exhibit the greatest kinetic isotope effect? Choose your answer before checking the explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from...

Can you solve this one? Check the second image for Dr. Romano’s solution. Free DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano

DAT and OAT General Chemistry | DAT Destroyer | OAT Destroyer | Dr. Jim Romano Can you solve this one? Check the second image for Dr. Romano’s solution. Free DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano...

Periodic table trends are an important General Chemistry concept for both the DAT and OAT. Ionization energy, electronegativity, atomic radius, electron affinity, and metallic character follow important general trends across the periodic table, with some exceptions. Take a look at the chart...

Periodic table trends are an important General Chemistry concept for both the DAT and OAT. Ionization energy, electronegativity, atomic radius, electron affinity, and metallic character follow important general trends across the periodic table, with some exceptions. Take a look at the chart...

Naming compounds is one of the highest-yield General Chemistry topics on both the DAT and OAT. Students often memorize rules without understanding the underlying patterns, making nomenclature questions much harder than they need to be. In this lesson, Dr. Jim Romano explains a systematic...

Naming compounds is one of the highest-yield General Chemistry topics on both the DAT and OAT. Students often memorize rules without understanding the underlying patterns, making nomenclature questions much harder than they need to be. In this lesson, Dr. Jim Romano explains a systematic...

Every class is an opportunity to strengthen concepts, ask questions, and build the confidence needed for test day. At DAT Destroyer, students don't just memorize answers—they learn how to think through challenging Biology, General Chemistry, Organic Chemistry, and Quantitative Reasoning...

Every class is an opportunity to strengthen concepts, ask questions, and build the confidence needed for test day. At DAT Destroyer, students don't just memorize answers—they learn how to think through challenging Biology, General Chemistry, Organic Chemistry, and Quantitative Reasoning...

Congratulations to one of our students on earning a 500 Academic Average (AA), including an outstanding 600 in General Chemistry! — "Michael" (Name changed for privacy) Congratulations on an outstanding achievement, and thank you for allowing us to share your success. We wish you continued...

Can you identify the metal catalyst used in the Heck cross-coupling reaction? The Heck reaction is one of the highest-yield reactions tested on the DAT and OAT. Before looking at the second slide, see if you can identify the catalyst required for this important carbon-carbon bond-forming...

Can you identify the metal catalyst used in the Heck cross-coupling reaction? The Heck reaction is one of the highest-yield reactions tested on the DAT and OAT. Before looking at the second slide, see if you can identify the catalyst required for this important carbon-carbon bond-forming...

Congratulations to another outstanding OAT student! We're grateful that this student allowed us to share their experience anonymously to help encourage future optometry students. OAT Scores Academic Average: 370 (95th percentile) Total Science: 360 (88th percentile) Biology: 400 (99th...

Enrollment is now open for our Fall 2026 DAT and OAT Preparation Classes. For more than 35 years, Dr. Jim Romano has helped thousands of students prepare for the DAT and OAT through comprehensive study materials and live instruction. Our program features: Live online and in-person classes...

Understanding atomic orbitals is essential for success in General Chemistry and on the DAT. In this video, Dr. Jim Romano discusses atomic orbitals, electron configurations, orbital filling order, and the Aufbau Principle. Free DAT & OAT Resources: Start Your DAT and OAT Preparation for Free...

A positive cell potential indicates a spontaneous galvanic cell reaction. Consider the following cell: Pb / Pb(NO₃)₂ (1.0 M) || AgNO₃ (1.0 M) / Ag As this cell operates, which reaction occurs at the negative electrode? ✅ Correct Answer: B Pb → Pb²⁺ + 2e⁻ Key concepts tested: •...

Can you solve this DAT General Chemistry challenge? Take a moment to work through the problem before swiping to Slide 2 for the answer and explanation. Electrochemistry is a high-yield topic for the DAT and OAT. This challenge reviews the role of the salt bridge in a voltaic (galvanic)...

Free DAT Preparation Resources: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano Website: DAT Destroyer – #1 DAT Exam & OAT Prep by Dr. Jim Romano YouTube Channel: https://www.youtube.com/@ORGOMAN-DAT-DESTROYER Facebook Study Group...

Kinetics and Activation Energy are two important General Chemistry topics tested on the DAT and OAT. In this video, Dr. Jim Romano explains reaction rates, activation energy, collision theory, and the factors that affect chemical reactions. Free DAT Resources: Start Your DAT and OAT...

Colligative Properties can be challenging because many students try to memorize equations without first understanding the concepts. In this General Chemistry lesson, Dr. Romano reviews the principles behind freezing point depression, boiling point elevation, vapor pressure lowering, and...

Many students overcomplicate quantitative comparison questions and miss the key relationship. Try this DAT Quantitative Comparison Challenge before looking at the answer slide. Many students overcomplicate quantitative comparison questions and miss the key relationship. What answer did...

Can you identify the correct answer before viewing the solution? Understanding resonance structures and electron delocalization is essential for success in General Chemistry and frequently tested on both the DAT and OAT. If you're preparing for the DAT or OAT, the DAT Destroyer and Math...

Can you solve this problem before going to Slide 2? Many students correctly calculate the restricted arrangements in this classic DAT permutation problem but miss what the question is actually asking. The key is to determine the difference between the unrestricted and restricted seating...

Can you answer this DAT General Chemistry question before going to Slide 2? Quantum numbers are a frequently tested topic on the DAT and OAT. Understanding how electron configurations relate to the four quantum numbers can help you answer these questions quickly and accurately on test day...

Quantum numbers are a fundamental General Chemistry topic that frequently appears on both the DAT and OAT. In this video, Dr. Jim Romano explains: • Principal Quantum Number (n) • Angular Momentum Quantum Number (l) • Magnetic Quantum Number (ml) • Spin Quantum Number (ms) Understanding...

The Van der Waals equation of state for one mole of a real gas is as follows: (P + a/V²) (V - b) = RT The constant "a" provides a measure of the average attraction of the molecules, whereas constant "b" adjusts for the volume occupied by the gas particles. Which would you predict to have the...

One of the most rewarding parts of what we do is seeing students reach their goals and move one step closer to dental school. Dina recently earned: 450 Academic Average 470 Total Science 530 Organic Chemistry 430 Biology 450 General Chemistry 460 PAT 400 Reading Comprehension...

Wanted to share my DAT scores with everyone. AA: 450 TS: 460 Biology: 500 Thank you DAT Destroyer Team for everything. I could not have done it without you or the DAT Destroyer. — Max Students often ask which DAT study materials are actually used in real courses. The DAT Destroyer and...

Understanding reaction mechanisms is essential for success on the DAT Organic Chemistry section. In this video, Dr. Jim Romano explains important DAT Organic Chemistry reaction mechanisms including SN1, SN2, E1, E2, carbocation rearrangements, and how molecular structure affects reactivity...

Understanding the Nernst equation is critical for DAT General Chemistry and electrochemistry problems. As product concentration increases, the reaction quotient Q increases, causing cell potential to decrease. Students often memorize equations without understanding how concentration changes...

We are giving away a free copy of the: • 2026 DAT Destroyer and Math Destroyer to one student preparing for the DAT. If you already own the DAT Destroyer and Math Destroyer, you may instead choose any 2 other books from our store. Dr. Jim Romano has been helping students prepare for the DAT...

tudents often ask which DAT study materials are actually used in real courses. The DAT Destroyer and Math Destroyer are the core books used in Dr. Jim Romano’s DAT preparation classes. DAT Destroyer: DAT Destroyer 2026 — Complete DAT Science Prep System | Dr. Jim Romano Math Destroyer: 2026...

Most DAT students get this wrong — and it costs easy points on test day. Gas laws are often memorized instead of understood, which leads to mistakes when the questions become slightly more complex. This quick breakdown shows a simple way to approach these problems so you actually understand...

Dr. Jim Romano discusses key General Chemistry applications that frequently appear on the DAT. Understanding how core principles translate into real exam questions is essential for strong performance in the General Chemistry section. Watch the video here: If you’re preparing for the DAT or...

How would you calculate Kb for the formate ion, given that the Ka for formic acid is 1.8 × 10⁻⁴ ? a. Kb = Ka × Kw b. Kb = Kw + Ka c. Kb = Kw / Ka d. Kb = Kw − Ka e. Kb = Ka / Kw Pause before scrolling if you want to simulate test conditions. Answer: C KaKb = Kw For a conjugate acid–base...