The closing entry. Roughly 500 words, written after The Chemistry Showcase is finished and before the course ends.
What to cover
- The sentence you wrote in Your First Entry about how chemistry knows things. Quote it. Would you still write it? If not, what replaced it, and what changed it — a specific investigation, a discussion, an argument you lost.
- The investigation you would run again. Not the one that went best. The one where you now know what you should have measured, or how many trials you actually needed.
- A mechanism you can explain now that you could not at the start. Explain it here, briefly, to a reader who has not taken the course. Why ionic compounds dissolve and molecular ones often do not. Why a limiting reagent limits. Why a gas pushes harder when you warm it. One of those, properly, beats five of them in outline.
- What you still do not understand. Named precisely. “Solutions” is not precise; “why a solution can be saturated and still have solid dissolving and crystallising at the same time” is.
- What you are taking with you if you never take another chemistry course. Be honest — for some of you the answer is a habit rather than a concept, and a habit is a perfectly good answer.
Prompts, if you are staring at a blank page
When did you first argue with a number instead of accepting it? Which page on this site did you actually return to more than once? What did you believe in Unit 1 that Unit 4 contradicted? When did the mole stop being a formula you looked up? Whose reasoning in this room changed yours, and on what? What is the first thing you now do when a calculated answer looks wrong? What would you tell somebody starting this course in the first week — not the encouraging version, the useful one?
Who to write it for
Not for me. I was in the room; I already know what happened. Write it for a student taking this course next year who is reading your journal to find out what it is like and what to do differently.
That reader changes what belongs in it. They do not need “the quantities unit was hard”. They need “I spent three classes treating the mole as a formula to substitute into, and the thing that finally worked was drawing the balanced equation and labelling which quantity I could actually measure.”
This is the entry I read first
If you are short of time at the end of the semester, put it here. A thin journal with a sharp final reflection tells me more than a thick one that stops at description — and Journal Checklist weights it accordingly.
Standard to match: What a Strong Entry Looks Like.