Analytical Chemistry

From Chemistry to PCB: Insights from Alumni on Growth | Successful Hosting of the ‘Reading the Life Book of Seniors’ Lecture (Issue 5)

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From Chemistry to PCB: Insights from Alumni on Growth | Successful Hosting of the 'Reading the Life Book of Seniors' Lecture (Issue 5)

Click the blue text aboveto discover more exciting content To deeply implement the fundamental task of cultivating virtue and fostering talent, guiding students to establish a scientific innovation concept, enhance employment competitiveness, and cultivate innovative and entrepreneurial talents with social responsibility and forward-looking vision, the Student Union of the School of Light Industry and Chemical … Read more

Research on the Potential Metal Contamination Issues Caused by 3D Printing Devices

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Research on the Potential Metal Contamination Issues Caused by 3D Printing Devices

Overview Recently, the environmental analytical chemistry team at the University of the Balearic Islands led by Edwin Palacio conducted a systematic study on the potential metal contamination issues caused by 3D printing devices in analytical chemistry. The team systematically evaluated the metal leaching behavior of six common 3D printing materials (PLA, PP, NY, Clear, Elastic, … Read more

Compilation of Chemistry Exam Questions from Chongqing: Topic 10 – Transformation of Substances and Process Flow

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Compilation of Chemistry Exam Questions from Chongqing: Topic 10 - Transformation of Substances and Process Flow

Topic10 Transformation of Substances and Process Flow Knowledge Points Covered Chemistry of Elements:Se、Ru、Fe、Sn、Cr and other elements’ valence, electron configuration, and compound properties. Reaction Principles: oxidation-reduction reactions, coordination reactions, hydrolysis reactions, and precipitation-dissolution equilibrium. Experimental Operations: titration analysis, precipitation separation, pyrolysis, condensation,pH control, etc. Calculation Skills: mass fraction, concentration calculations,Ksp applications, titration calculations, etc. Information Extraction: … Read more

Where Does Carbon Come From?

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Where Does Carbon Come From?

We are all children of the stars! ——Carl Sagan About 13.8 billion years ago, the universe was in a state of extremely high energy and density, with very high temperatures. After the Big Bang, through a long process of evolution, it formed into the shape we see today. The Big Bang only created three or … Read more

156 Key Experimental Knowledge for Gaokao Science Exam

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The experimental questions in the Gaokao science exam are hot topics, with a 100% reappearance rate. The “experimental ability” is one of the five major abilities assessed in the Gaokao, and it can reflect students’ basic subject literacy well. Here, I have compiled essential knowledge for physics, chemistry, and biology experiments that students must memorize. … Read more

Why Does Ferrous Hydroxide Change Color from White to Gray-Green?

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Why Does Ferrous Hydroxide Change Color from White to Gray-Green?

Welcome to join the C3H3 Teacher Group, to join the group please contact WeChat c3h3wxip, please indicate “Join Group“. There are various hypotheses regarding the composition of the gray-green substance, and each hypothesis has been validated by corresponding experimental evidence, mainly as follows: ①Fe₃(OH)₈ (or Fe(OH)₂·2Fe(OH)₃) ②Fe(OH)₂ adsorbs Fe²⁺ ③Fe(OH)₂ forms a complex with H₂O … Read more

The Untold History of ChemDraw

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The Untold History of ChemDraw

ChemDraw is a software used by chemists worldwide to draw molecular structures. The invention of this software once saved the marriage of Dave and Sally Evans. Harvard University chemistry professor David A. Evans recounts the story of ChemDraw and published an article in the German journal Angewandte Chemie (DOI:10.1002/anie.201405820). In 1983, Evans’s laboratory moved from … Read more

A Review of Surface-Enhanced Raman Spectroscopy (SERS): A Half-Century of Ups and Downs

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A Review of Surface-Enhanced Raman Spectroscopy (SERS): A Half-Century of Ups and Downs

ChemSocRev (Chemical Society Reviews) is a leading journal published by the Royal Society of Chemistry, featuring high-impact, authoritative, and highly readable review articles. Since its inception in 1947 as the Quarterly Review of the Chemical Society, ChemSocRev has published many influential review papers over the past 70 years, growing to become one of the most … Read more

How to Solve These Problems with Nor Flash?

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How to Solve These Problems with Nor Flash?

Source: Semiconductor Industry Observation In the past year, the soaring prices and promising prospects of Nor Flash have reignited confidence in encoded storage devices. Many manufacturers, including Gigadevice and Winbond, have made significant profits from this trend. While some may view this somewhat outdated product as lacking in technical content, Nor Flash faces various challenges … Read more

Understanding s-p-d and d-s-p Hybridization

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Understanding s-p-d and d-s-p Hybridization

If you find this helpful, please help by clicking the above ↑↑↑ “Chemistry Quick Reference” to follow our public account.Your encouragement is my motivation to keep updating. This time, I will share knowledge about s-p-d hybridization.I will also share a professional book on hybridization theory: A Simple Explanation of Hybrid Orbital Theory. Follow this public … Read more