Chemistry Video Resources
Paper 3 Practical Videos
O Level Chemistry Practical – Titration Marking Scheme
How to Test For Gases (Part 2)
O Level Chemistry Practical – How to Test for Gases (Part 1)
“How To” Videos
How to write chemical formulas
(O Level)
How To Draw Dot and Cross Diagrams for Covalent Molecules
Redox – How To Calculate Oxidation States
How to recall the 4 definitions of Redox quickly and effectively
How To Recall Properties of Ionic and Covalent compounds
Chemical Bonding – When to Use The Term Ion vs Electrons
How to Solve Excess Limiting questions… and Percentage Yield!
Mole calculation Concentration Worked Example
Chemistry Resouces For The O Level Chemistry Student
O Level Pure Chemistry Tuition: How to Avoid Empirical Formula Combustion Traps
You spend forty minutes navigating a grueling Mole Concept examination paper, feeling totally in control—until you hit a multi-step organic combustion analysis question. You meticulously tally up the masses of carbon dioxide and water produced, divide by relative...
O Level Pure Chemistry Tuition: A Simpler Way to Learn Qualitative Analysis
Qualitative analysis can feel overwhelming at first. Students are expected to recognise several different precipitate colours, solubility patterns and gas tests. The difficulty is that many of the observations appear similar. For...
Chemistry Tuition Guide: Sources of Error in O Level Titration
Students often find evaluation questions difficult. They may know that something has affected the experiment, but they do not know how to explain it clearly. As a result, they write vague answers such as: human error; the reading...
Pure Chemistry Tuition: How to Prepare for the O Level Chemistry Practical Exam
The O Level Chemistry practical examination can feel stressful. You have 1 hour and 50 minutes to complete the experiments, record your observations, process your results and answer the written questions. For many students, the main problem is not that they do not...
How To Handle Unfamiliar Organic Molecules In O Level Chemistry
Sometimes, Organic Chemistry questions look scarier than they really are. The exam may show a large organic molecule. There may be a long carbon chain. There may be rings. There may be many atoms drawn in the structure. Many students panic because they try to...
Polyester vs Polyamide: How To Tell The Linkages Apart
Macromolecules can look scary in O Level Chemistry. The structures are long, the chains look messy, and sometimes the question shows boxes, circles, hexagons or zigzag lines. Many students panic because they try to understand the whole polymer at once — and that is...
Cracking In O Level Chemistry: Why Long-Chain Alkanes Are Broken Down
Cracking is one of those Organic Chemistry topics that students often memorise without really understanding. They know it has something to do with crude oil, that long-chain hydrocarbons are broken down, and that alkenes are formed — but when the exam question asks...
O Level Organic Chemistry Reaction Map | Sec 4 Chemistry
# O Level Organic Chemistry Reaction Map: How To Link The Reactions Together Organic Chemistry can feel messy to many Sec 4 students. One moment they are learning alkanes. Then alkenes. Then alcohols. Then carboxylic acids. ...
# Esters In O Level Chemistry: What Students Actually Need To Know
Esters are a small but common part of O Level Organic Chemistry. The problem is that many students either overcomplicate the topic or memorise it without really understanding what is happening. For O Level Chemistry, students mainly need to know: what esters are how...