93 articles
Lab Techniques & Analysis
Titration, chromatography, spectroscopy, lab safety and how chemists identify substances.
Careers in Analytical Chemistry
What analytical chemists do and where they work: pharmaceuticals, environment, food, forensics, clinical labs, materials and research; typical roles from technician to lab manager; the skills employers want; qualifications; and how students can start building experience now.
Luminol: How Crime Scene Investigators Find Blood
How luminol makes invisible traces of blood glow blue: the chemistry of chemiluminescence, why iron in haemoglobin acts as a catalyst, false positives from bleach and metals, other presumptive blood tests, and what happens after the glow.
Burette vs Pipette
The difference between a burette and a pipette explained for beginners: what each measures, how they're read and used, typical uncertainties, volumetric vs graduated pipettes, why a titration needs both, common mistakes and how to choose the right one.
Chromatography: Separating Mixtures by How They Move
The big idea behind every type of chromatography: stationary and mobile phases, partition and adsorption, why substances separate, and how paper, TLC, gas, liquid and column chromatography compare.
Chromatography Practice Questions
Eighteen chromatography practice questions with worked answers: Rf calculations, reading paper and TLC chromatograms, identifying food dyes and inks, choosing solvents, polarity and retention, and interpreting gas chromatograms and HPLC peaks, from beginner to exam level.
What Makes a Fair Test?
What a fair test is and why it matters: changing one variable at a time, controlling others, repeats, control experiments, validity, reliability and reproducibility, with chemistry examples of fair and unfair tests.
The Chemistry of Fingerprint Detection
What a fingerprint is made of and how chemistry makes it visible: powders, ninhydrin and its purple product, superglue fuming, iodine, silver nitrate, fluorescent dyes, and how investigators choose the right method for each surface.
Forensic Chemistry: Science at the Crime Scene
What forensic chemists actually do: identifying drugs, poisons, fire accelerants, gunshot residue, paint, glass and fibres, the instruments they rely on, why chain of custody matters, and how the job differs from what you see on television.
TV Forensics vs Real Forensic Chemistry
What crime dramas get wrong about forensic chemistry: instant results, one machine that identifies anything, perfect matches, enhanced images, luminol proving blood, and lone scientists solving cases, compared with how real forensic labs work and why the differences matter.
What Is a Fume Cupboard For?
How a fume cupboard (fume hood) protects you: airflow and face velocity, the sash as a shield, when you must use one, how to work in one correctly, what it can't protect against, types of fume cupboard, and the checks that keep it safe.
Drawing Good Graphs for Chemistry Practicals
How to choose, draw and read graphs in chemistry: line vs bar charts, axes, scales, plotting, lines and curves of best fit, anomalies, gradients and intercepts, with the rules examiners use to award marks.
GHS Hazard Pictograms Explained
What each of the nine GHS hazard pictograms means, which chemicals carry them, the signal words Danger and Warning, H and P statements, and how to read a modern chemical label.
Safe Chemistry Experiments You Can Do at Home
Eight home chemistry investigations that run over hours or days, using safe household materials: growing crystals, what makes iron rust, dissolving eggshells, invisible inks, marker chromatography, a density tower, yeast and hydrogen peroxide, and sugar in drinks, with the chemistry explained and safety rules.
Independent, Dependent and Control Variables
How to identify the independent, dependent and control variables in a chemistry experiment, why controlling variables makes a fair test, writing a testable hypothesis, and examples from common practicals.
Solving a "Crime" with Ink Chromatography
A complete forensic-style practical: identify which suspect's pen wrote a ransom note using paper chromatography. Includes the scenario, equipment, safety, step-by-step method, a sample results table with Rf values, analysis, evaluation questions and extension ideas.
Kitchen Science: 10 Experiments with Household Items
Ten quick kitchen chemistry demonstrations that take about ten minutes each: a CO₂ balloon, plastic from milk, dancing raisins, pepper and soap, ice cream in a bag, shiny coins, a lemon battery, emulsions, starch detection and a colour-changing cabbage drink, each with the chemistry behind it.
Chemistry Lab Equipment: Names and Uses
A guide to 40 common pieces of chemistry lab equipment, grouped by job: containers, measuring, heating, separating, holding and safety, with what each is for and tips on using it correctly.
Chemistry Lab Report: An Annotated Example
A complete example chemistry lab report on the effect of temperature on reaction rate (sodium thiosulfate and acid), with annotations explaining what makes each section strong and how it would be marked.
How to Write a Chemistry Lab Report
A section-by-section guide to writing a clear chemistry lab report: title, aim, hypothesis, method, results tables and graphs, analysis, evaluation and conclusion, with tips on scientific writing and common mistakes.
Lab Safety Myths
Thirteen common lab safety myths corrected: that gloves protect against everything, that dilute means safe, that you should neutralise an acid splash with a base, that water puts out every fire, that small quantities can't hurt you, and more, with the chemistry behind each correction.
Lab Safety Quiz with Explanations
A 20-question lab safety quiz for chemistry students covering eye protection, hazard symbols, heating, diluting acids, spills, fires, gas cylinders, waste and emergencies, with the correct answer and a clear explanation of the reason behind every rule.
Chemistry Lab Safety Rules Every Student Should Know
The essential rules for working safely in a school or college chemistry lab: what to wear, how to behave, handling chemicals and glassware, heating safely, emergencies and clean-up, with the reason behind each rule.
Averages and Anomalies in Lab Data
Worked examples on handling repeat results in chemistry: calculating the mean, median and mode, spotting anomalous results, when to exclude them, concordant titres, range as a measure of spread, and choosing sensible significant figures for an average.
Measuring Volume: Beakers, Cylinders, Pipettes and Burettes
How to choose and use volume-measuring equipment: accuracy of beakers, measuring cylinders, pipettes, burettes and volumetric flasks, reading the meniscus correctly, and calculating percentage uncertainty.
Paper Chromatography: Method and Rf Values
A complete guide to paper chromatography: the principle of stationary and mobile phases, a step-by-step method, calculating Rf values, identifying substances, locating colourless spots, and evaluating results.
Required Practicals: A Skills Checklist
A self-assessment checklist of the core practical skills chemistry students need: safe working, measuring mass and volume, heating, titration, separation, preparing solutions, recording data, drawing graphs and evaluating errors, with what 'good' looks like for each and how to practise.
Qualitative vs Quantitative Analysis
The difference between finding out what's in a sample and how much of it there is: definitions, methods, examples, and how chemists combine qualitative tests and quantitative measurements in real analysis.
Calculating Rf Values
How to measure and calculate Rf values in paper and thin-layer chromatography, with worked examples, identifying unknowns, what affects Rf, common mistakes and practice questions with answers.
Teaching Chromatography
A teacher's guide to chromatography lessons: a hook activity, explaining separation with analogies, running reliable paper and TLC practicals, common student misconceptions, Rf calculations, linking to GC and HPLC, differentiation ideas and assessment questions.
Teaching Lab Safety Effectively
A guide for chemistry teachers on teaching safety so it sticks: explaining the reasons behind rules, modelling behaviour, hazard-spotting activities, student-written risk assessments, drills, real case studies, dealing with incidents, and building a positive safety culture from the first lesson.